There is no need to capitalize any words - it doesn't make any difference.
Including or excluding words:
To make sure that a specific word is always included in your search topic, place the plus (+) symbol before the key word in the search box. To make sure that a specific word is always excluded from your search topic, place a minus (-) sign before the keyword in the search box.
Example: If you were looking for recipes for cookies with oatmeal but without raisins, you would try: recipe cookie +oatmeal -raisin.
Expand your search using wildcards (*):
By typing an * at the end of a keyword, you can search for the word with multiple endings.
Example: Try wish*, to find wish, wishes, wishful, wishbone, and wishy-washy.