Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"model learning method algorithm" » "model learning mom algorithm", "model learning methods algorithm", "model graining methods algorithm", "model learning emotion algorithm", "mobile learning method algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("model learning method algorithm") or ("modified multiobjective estimation algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("model learning method algorithm") OR ("modified multiobjective estimation algorithms")).
• Removing quotes may allow a broader search: (( model learning method algorithm ) or ( modified multiobjective estimation algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("model learning method algorithm") or ("modified multiobjective estimation algorithms"))*.