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 large variation algorithm" » "modified large estimation algorithm", "modified large predation algorithm", "modified large estimation algorithms", "modified large evaluation algorithm", "modified male variation algorithm"

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 optimization algorithm") or ("modified large variation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective optimization algorithm") OR ("modified large variation algorithm")).
• Removing quotes may allow a broader search: (( modified objective optimization algorithm ) or ( modified large variation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithm") or ("modified large variation algorithm"))*.