Phrase searching is one of the most powerful ways to search, giving you a much more exacting results set. Put phrases in double quotes.
"alternative energy" OR "solar power"
Using AND, OR, and NOT will broaden or narrow your search. Remember, OR is more (results).
Refining a search is like editing a draft. You have to really look at what you've got, as above, and make changes.
Sometimes an assignment calls for sources beyond books and journals. Look for our databases that contain: