When developing keywords for your topic, here are a few general rules to keep in mind:
For example, for the topic:
This is how you can apply the general rules:
1. Keep the nouns and/or noun phrases:
2. Get rid of noise words:
3. Think of similar words/synonyms:
4. Apply truncation mark to search words with variant endings:
The screenshot below shows the search limits/refinement options available in Communication and Mass Media Complete, a major database for the subject of Communication.
You should make good use of these options to narrow down your results (e.g. source type and subject), especially when you are searching very broad terms.
Getting familiar with these functions when searching in a particular database will definitely help save time!