Most databases are not intelligent and will search for exactly what you type in.
You can make your search more effective and save yourself time by using truncation symbols and wildcards to find different spellings and word endings.
Truncating your term will look for variations in word endings, for example:
Wildcards allow you to search for spelling variations, for example:
Enclosing your terms in quotation marks will search for the exact words next to each other in the order entered, for example:
Proximity enables you to specify that 2 words should be near to each other or a certain distance from each other, for example:
Hint: each database has it's own way of proximity searching, so check the online help before you start searching.