Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"towler graining methods algorithm" » "towler learning methods algorithm", "towler learning method algorithm", "towler making methods algorithm", "tower graining methods algorithm", "bowler graining methods 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: (("towler graining methods algorithm") or ("modified multiobjective optimization algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("towler graining methods algorithm") OR ("modified multiobjective optimization algorithms")).
• Removing quotes may allow a broader search: (( towler graining methods algorithm ) or ( modified multiobjective optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("towler graining methods algorithm") or ("modified multiobjective optimization algorithms"))*.