- When searching you sometimes need to think of synonyms for a concept in order to capture all the information on that concept
- For example, to capture all the information on heart attacks you would search:
- heart attack  OR myocardial infarction  OR cardiac arrest 
- The Venn diagram below illustrates how 3 sets of information, combined using OR, gives you all three sets of information in your results
What to watch for: do not overdo it when it comes to synonyms, only use the most logical; do not include broader concept terms, this will take away the focus of your search.