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

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