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Keywords and Search Terms
Once you've decided on your topic, be sure to pick out the keywords - the big ideas or main concepts - in your research question. You can make your search more effective by using the following to separate your keywords (terms):
AND - findall the terms (ex. petroleum AND hydrocarbon)
OR - find any of the terms (ex. petroleum OR hydrocarbon)
NOT - excludea certain term (ex. petroleum NOT hydrocarbon)