In sum, the following advice will serve researchers in formulating their searches.
Focus on your search goal rather than looking for general information.
Begin by understanding the analytical goals that you have. What are the:
Questions you want to answer?
Statements you want to make? Or
Inferences you intend to assert?
Look for key indicators:
Drill down to find the measures for those indicators
Then obtain the results or data that most closely match your goals.
Obtain the information you need to assess the uncertainty associated with each estimate. This includes the methods used to collect, process and analyze the results and the problems the original data collection encountered as well as the designed features that added statistical ‘error.’