Perhaps you should try some spelling variations:
"requires high coverage" » "required high coverage" (Expand Search), "requires high average" (Expand Search), "requireds high coverage" (Expand Search)
"require higher coverage" » "require higher average" (Expand Search), "required higher coverage" (Expand Search)
"requireds high coverage" » "requireds high average" (Expand Search), "requiredds high coverage" (Expand Search), "required high coverage" (Expand Search)

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("requires high coverage") OR ("require higher coverage"))) OR ("requireds high coverage"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"requires high coverage\") OR (\"require higher coverage\"))) OR (\"requireds high coverage\"))".
• Removing quotes may allow a broader search: (((( requires high coverage ) OR ( require higher coverage ))) OR ( requireds high coverage )).
• Adding a wildcard symbol may retrieve word variants: (((("requires high coverage") OR ("require higher coverage"))) OR ("requireds high coverage"))*.