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