When fuzzy search results are poor and value terms are missing, focus the result by setting the Search Logic to Boolean. By default, the search words are ANDed together, forcing each term to be found. Use these tips to solve this problem. Your words describing a topic may not be the common usage for the subject. Read the best citations for specific terms to add to your search formulation.
Substitutions often produce stunning results.
If you have a Boolean search, you may need to eliminate some of the terms. In Boolean searches, concepts may be ANDed together, limiting Knowledge Web to only documents with ALL of the concepts together. That may be too restrictive. Check your terms, and retain only the most important. Some complex topics may best be handled using Boolean logic.