Perhaps you should try some spelling variations:
"modified multiobjective optimizer algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective optimized algorithms", "modified multiobjective optimized algorithm"
"core graining methods algorithm" » "core learning methods algorithm", "core learning method algorithm", "core making methods algorithm", "coarse graining methods algorithm", "colregs training methods algorithm"

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

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