You can use boolean operators such as AND, OR and NOT to refine your results by combining or limiting search terms.
AND will return you all the results from both keywords
Search: milk AND sugar
OR will return you results from either keyword
Search: milk OR sugar
NOT will give you results for the first keyword but not the second
Search: milk NOT sugar
Combine OR and AND for more effective searching
Search: (milk AND sugar) OR (lemon AND sugar)
Using * (the asterisk symbol) will allow you to search any deviation of your keyword
For example: “fact*” will find results for: fact, facts, factoid, factual etc
Search: fact*
Using ” ….” will allow you search just for those actual words or phrases.
For example: “tea in health and disease prevention”