To be able to build a proper search query you need to combine the search word correctly. To do this you should use the Boolean operators:

- All search terms should be included in the hits
- Limits the search result, i.e. reduces the number of search hits
- Space between words equals AND

- At least one (either - or) of the terms should be found in the search hits
- Use for synonyms or other alternative words
- Broadens the search, i.e. results in more hits

- The term should NOT be found in the hits
- Restricts the search result, i.e. less hits
- You may, by mistake, take away hits of potential interest
Use CAPITALS when you write the Boolean operators. Some databases accept lower case letters, but not all. In Google you have to use capitals.