Perhaps you should try some spelling variations:
"modified staffing optimization algorithm" » "modified staffing optimization algorithms", "modified staffing optimisation algorithm", "modified staffing estimation algorithm", "modified caging optimization algorithm"
"modified objective optimized algorithms" » "modified objective optimized algorithm", "modified objective optimizer algorithms", "modified objective optimization algorithms", "modified objective optimal algorithms"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective optimized algorithms") OR ("modified staffing optimization algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified objective optimized algorithms\") OR (\"modified staffing optimization algorithm\"))".
• Removing quotes may allow a broader search: (( modified objective optimized algorithms ) OR ( modified staffing optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimized algorithms") OR ("modified staffing optimization algorithm"))*.