Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"
"towler graining methods algorithm" » "towler learning methods algorithm", "towler learning method algorithm", "towler making methods algorithm", "tower graining methods algorithm", "bowler graining methods algorithm"

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"towler graining methods algorithm\") OR (\"modified multiobjective optimization algorithm\"))~".
• Removing quotes may allow a broader search: (( towler graining methods algorithm ) OR ( modified multiobjective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("towler graining methods algorithm") OR ("modified multiobjective optimization algorithm"))*.