Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"modified up solution algorithm" » "modified up evolution algorithm", "modified up convolution algorithms", "modified up evolutionary algorithm", "modified _ solution algorithm", "modified df solution algorithm", "modified bi1 solution algorithm", "modified up solutions algorithm", "modified drug solution algorithm"

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