The words you type into the search box affect your search results. Not all authors use the same language to describe similar topics, so you will need to try a variety of searches.
Operator | Example |
AND joins dissimilar terms. It helps narrow your search. | asthma AND children |
OR joins similar terms. It helps broaden your search. |
California OR Merced |
Use AND & OR together, as well. |
asthma AND children AND Latin* AND California OR Merced |
The asterisk * is the most common truncation symbol.
You do have to be careful with truncation. Sometimes you might get unexpected results.