How to Search / Find / Research Paper | Full Review of Scientific Search Engines | Urdu/Hindi

Finding relevant research papers for a literature review depends less on luck and more on using the right search engines with the right filters—especially when access is limited by paywalls. The core workflow presented centers on starting with an abstract to quickly judge whether a paper matches the research goals, then using targeted databases to gather full-text options that may be free through open-access or alternative access routes.

The process begins with a discipline-specific search approach using a database interface that supports multiple data sources. By selecting whether to include citations and/or patents, and by narrowing results to a specific time window (for example, the last 5–10–15 years or a single year like 2021), researchers can rapidly collect a manageable set of papers tied to their topic. The transcript illustrates this with an example topic—applications of “azoi based ionic liquids”—showing how results can be filtered by publication year and then downloaded as PDFs when available. It also highlights a practical access strategy: if a paper is not freely available, the abstract still provides a high-level “fit check” before attempting full access.

A second major tool is ScienceDirect (Elsevier), where search can be refined using keywords, author names, journal selection, and publication metadata such as volume, issue, and page numbers. Results can then be narrowed further with filters for publication year and article type—separating review articles from research articles. The transcript emphasizes that this kind of filtering reduces noise: instead of scanning thousands of papers, researchers can focus on the most relevant subset, such as only papers from a particular year or only review articles.

ScienceDirect is also presented as a way to explore topic breadth across disciplines. Filters can be applied not just by year or article type, but by subject area (e.g., chemistry, biochemistry, genetics, chemical engineering, materials sciences, physics and astronomy). Open-access constraints are handled too, with the ability to surface open-access papers among the larger result set. The transcript provides example counts to show how filtering changes the output—for instance, narrowing to open-access items and then selecting those with free full text.

A third option is PubMed, described as open-access and usable without subscription purchases. Like the other platforms, it supports filtering and allows users to retrieve free full-text papers, along with book and document formats. The overall message is straightforward: combine abstract screening with disciplined filtering across multiple databases to maximize the amount of relevant literature gathered—without getting stuck behind paywalls.

By the end, the transcript frames these tools as “hot search engines” for free or subscription-free access, encouraging viewers to ask follow-up questions in comments for more topic-specific guidance and to share the workflow with others doing literature reviews.