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