Identify the key words that describe your topic and use them to search the library catalog and databases. Make a list of synonyms for those words and search with those, too. Enclose words in "quotation marks" when you want multiple words to express one idea or concept.
Examples:
collage and 20th century
Kurt Schwitters and collage
collage and "abstract expressionism"
Use the words AND, OR, and NOT--called boolean operators--between your keywords to broaden or narrow your search.
Example:
collage AND (assemblage OR "mixed media")
If you shorten, or truncate, a word and then use an asterisk to "stand-in" for its different endings, your search results will include multiple forms of the word.
Example:
A keyword search for Dada* will look for Dadaism and Dadaist(s).
Use Subject Terms (assigned by the Library of Congress) to find like items in the library catalog and in journal databases. If you find a useful book or article, its catalog record usually will include Subject Terms that you can use to find related research material.
Examples:
Collage--Influence.