Visit the How to Research Guide to learn about the research process, especially these pages:
Here are some examples of how to combine key terms for Norse mythology topics:
| Technique | Example | 
| Combine different concepts using "AND" | Thor and Viking AND mythology | 
| Combine synonyms or related terms using "OR" | Viking OR Norse | 
| Put parentheses around similar terms for complex searches | Thor AND (Viking OR Norse) AND mythology | 
| Use the truncation symbol (usually *) to make a search term open-ended | Thor AND (Viking OR Norse) AND myth* |