SEARCH HINT: Most databases use a truncation symbol--sometimes called a wild card--that you can use at the end of your keywords to pick up variant endings of that word. In most databases, this truncation symbol is the asterisk *
Use this at the end of a root word to pick up all the endings of the word, e.g., slave* will pick up slave, slaves, slavery, slaveholder, slaveowner, etc.
SEARCH HINT: Put quotation marks around phrases when searching in order to get the words in that order. For example, "vietnam war"
There are several other databases that you might search. I strongly recommend you search first in America: History and Life, but the following are other choices for you to find scholarly articles.