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)
"requireds high coverage" » "requireds high average" (Expand Search), "required high coverage" (Expand Search), "requiredds high coverage" (Expand Search)
"require higher coverage" » "require higher average" (Expand Search), "required higher coverage" (Expand Search)

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 ((("requireds high coverage") OR ("require higher coverage"))))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"requires high coverage\") OR (((\"requireds high coverage\") OR (\"require higher coverage\"))))*".
• Removing quotes may allow a broader search: (( requires high coverage ) OR ((( requireds high coverage ) OR ( require higher coverage ))))*.