Perhaps you should try some spelling variations:
"modified multiobjective optimizer algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective optimized algorithms", "modified multiobjective optimized algorithm"
"tower graining methods algorithm" » "tower learning methods algorithm", "tower learning method algorithm", "tower making methods algorithm", "power graining methods algorithm", "lower graining methods algorithm"

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

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