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