Perhaps you should try some spelling variations:
"modified optimal optimization algorithms" » "modified optimal optimisation algorithm", "modified optimal estimation algorithms", "modified optimal estimation algorithm", "modified geometrical optimization algorithms", "modified global optimization algorithms", "modified thermal optimization algorithms"
"modified objective optimal algorithm" » "modified objective optimized algorithm", "modified objective optimized algorithms", "modified objective optimizer 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 optimal optimization algorithms") or ("modified objective optimal algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified optimal optimization algorithms") OR ("modified objective optimal algorithm")).
• Removing quotes may allow a broader search: (( modified optimal optimization algorithms ) or ( modified objective optimal algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified optimal optimization algorithms") or ("modified objective optimal algorithm"))*.