Perhaps you should try some spelling variations:
"modified objective optimization algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective estimation algorithm"
"modified cover optimized algorithms" » "modified cover optimized algorithm", "modified cover optimizer algorithms", "modified cover optimization algorithms", "modified covers optimized algorithms", "modified over optimized algorithms"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified cover optimized algorithms") or ("modified objective optimization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified cover optimized algorithms") OR ("modified objective optimization algorithm")).
• Removing quotes may allow a broader search: (( modified cover optimized algorithms ) or ( modified objective optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified cover optimized algorithms") or ("modified objective optimization algorithm"))*.