AND links together new aspects of your topic. It tells the database that all the search terms must be present in the results.
For example: (cloning AND ethics AND humans) would bring in results like the diagram
OR links synonyms or similar ideas. Using OR will bring in more search results as results containing any combination of one or more of these words will be found
For example: you might be interested in ("global warming" OR "climate change").
Use quotation marks when you want to tell the database to search a phrase.
For example: (UTM OR “University of Toronto Mississauga”)
Truncation is a technique that broadens your search to include various word endings and spellings. To use truncation, enter the root of a word and add the truncation symbol at the end.
For example: Evol*