Different databases offer different options to limit the list of search results, including but not limited to:
The database will offer ways to toggle these limiters on or off (i.e., through clickable checkboxes, icons, radio buttons, etc.).
For articles that are not available in full text, use the InterLibrary Loan service.
Here are some example search terms you can use to contruct keyword or subject searches. Note the use of the terms AND and OR: These terms combine different keywords/subject terms to broaden the search results.
Many electronic systems, like databases, library catalogs, and Google, default to "Keyword" searching. Keyword searching uses "natural language," or words that a user might use in their everyday speech or writing. Keyword terms can appear anywhere or any field in a record, such as title, author, subject, note, etc. The meaning of the words are not considered. For example, the terms "heavy metal" could pull results related to music or to metallic elements.
Keyword search results are usually grouped by relevance, with the best matches near the top of the list.
A "Subject" search uses subject terms or subject headings to retrieve search results. Subject terms/headings are terms that are used to define or describe the information within the given database or searching system. Subject searching is targeted searching that uses specific terms or phrases that are highly relevant to the topic. It will locate all records based on the subject term, excluding other fields (e.g., "title," "notes," "all text," etc.). This ensures that the results are related and focused on the subject search or the desired topic, which saves the researcher time.
Most databases use a controlled vocabulary to facilitate subject searching, organize information, and make browsing more efficient and specific to chosen terms. The database's Thesaurus or Subject Terms area will contain an alphabetical listing of its controlled vocabulary terms. For instance, the database Academic Search Premier offers a "Subject Terms" tab, and the MLA International Directory database features a "Thesaurus" tab or "Names as Subjects" tab. Enter terms in the Browsing box to see how the database recognizes them. You can then incorporate subject terms into your database searches to retrieve more precise results.