There are several databases that you can use to find articles. Remember that databases will only include journals that are within that particular subject area. For instance, if you are interested in nutrition needs for the elderly, then you would want to use AgeLine. If you want articles on behavioral therapy interventions for anorexia, then you would want to use PsycInfo.
Overviews of academic journals aimed at helping professors, graduate students, and researchers publish their manuscripts. Information includes the type of review process, acceptance rate, and the number of internal and external reviews used by the journal. The predatory reports module identifies deceptive and fraudulent journals by reviewing on a 65-point metric to flag potentially exploitative or dishonest operations.
AND
for when you need all terms in a search string included in the articles you retrieve
OR
for when you have more than one way to say the same thing
if either of the terms shows up in articles retrieved it will be a useful article
* !
wild-cards for getting a root word and all of it's endings
for example: nutri* will search for nutrition, nutritious, nutrient, nutritional, etc.