1. Keywords are the most important words in your topic
Is the petroleum industry contributing to climate change in Canada?
= petroleum industry + climate change + Canada
2. Also think of other words or phrases related to your topic (Synonyms).
Climate change = global warming
Petroleum = oil
*A concept map can help you come up with related terms to your topic
3. Search again and again using different keywords!
4. Use the limiters available like “Peer Reviewed” or “Date Range”