It is vital to know the differences between keywords and subjects when searching.
Keyword searches are very similar to Google searches; whatever words you searched will turn up in your list of results, regardless of where your searched words are on the page.
Subject searches, however, will only generate results in which the searched word appears in the subject field.
The charts below will help you distinguish between keyword searching and subject searching.
It is also important to note that keyword searches can be used almost anywhere - searching library databases, OneSearch, the library catalog, or the internet - while subject searches are best used when searching the library databases or the library catalog.
Images: "Keywords vs Subjects." Database Search Tips, MIT, https://libguides.mit.edu/c.php?g=175963&p=1160804. Accessed 24 May 2017.