The library offers lots of workshops on critical thinking. We also have recordings of previous workshops which are available on the Academic Skills Hub and dedicated articles to get you thinking critically.
Here are some ideas on what makes a good keyword:
Think about who the population/ sample group. Are you looking for a particular age group, ethnicity, cultural background, gender, health issue etc.
What is the intervention/issue you want to know more about? This could be a particular type of medication, education, therapeutic technique etc.
Do you have a particular context in mind? This could relate to a community setting, hospital, ward etc.
It is important to remember that databases will only ever search for the exact term you put in, so don't panic if you are not getting the results you hoped for. Think about alternative words that could be used for each keyword to build upon your search.