There are many databases that you can use to find articles. Remember that databases will only include journals that are within that particular subject area.
Once you finish laughing you may find you actually understand boolean searching once and for all. This lady is bit odd but she's a great teacher!
for when you need all terms in a search string included in the articles you retrieve
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: communicat* will search for communication, communicating, communicates, communicated, communicator, etc.