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