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"
"modified df optimisation algorithmssssssss" » "modified _ optimisation algorithmssssssss", "modified _ optimization algorithmssssssss", "modified qoe optimization algorithmssssssss", "modified adam optimisation algorithmssssssss", "modified bi1 optimisation algorithmssssssss"

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: "((\"modified df optimisation algorithmssssssss\") OR (\"modified objective optimization algorithm\"))~".
• Removing quotes may allow a broader search: (( modified df optimisation algorithmssssssss ) OR ( modified objective optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified df optimisation algorithmssssssss") OR ("modified objective optimization algorithm"))*.