Perhaps you should try some spelling variations:
"require high coverage" » "required high coverage" (Expand Search), "require high average" (Expand Search)
"require higher coverage" » "required higher coverage" (Expand Search), "require higher average" (Expand Search)
"requires high coverage" » "requireds high coverage" (Expand Search), "requires high average" (Expand Search), "required high 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: (((("require high coverage") OR ("require higher coverage"))) OR ("requires high coverage"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"require high coverage\") OR (\"require higher coverage\"))) OR (\"requires high coverage\"))*".
• Removing quotes may allow a broader search: (((( require high coverage ) OR ( require higher coverage ))) OR ( requires high coverage ))*.