Truncation (shortening your keyword) makes the search engine look at other possible forms of a word for which you are searching. Use truncation to find plurals and variations on the endings of a word. To truncate, use the asterisk symbol: *. You can enter this symbol by hitting Shift and 8 on the keyboard at the same time or by hitting the asterisk symbol on the number pad.
Search Example
You want to find the following terms: Christianity, Christian, Christians
Type Christian*