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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"program complement\") OR (((\"program implemented\") OR (\"program implementing\"))))~".
• Removing quotes may allow a broader search: (( program complement ) OR ((( program implemented ) OR ( program implementing ))))~.
• Adding a wildcard symbol may retrieve word variants: (("program complement") OR ((("program implemented") OR ("program implementing"))))*.