Perhaps you should try some spelling variations:
"modified df optimization algorithmss" » "modified df optimization algorithms", "modified df optimisation algorithm", "modified df estimation algorithms", "modified df optimization algorithmsss", "modified df optimisation algorithmss", "modified df estimation algorithmss", "modified _ optimization algorithmss", "modified qoe optimization algorithmss", "modified _ optimisation algorithmss", "modified adam optimization algorithmss", "modified bi1 optimization algorithmss"
"modified multiobjective optimization algorithm" » "modified multiobjective optimization algorithms", "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithm"

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified multiobjective optimization algorithm") OR ("modified df optimization algorithmss"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified multiobjective optimization algorithm\") OR (\"modified df optimization algorithmss\"))".
• Removing quotes may allow a broader search: (( modified multiobjective optimization algorithm ) OR ( modified df optimization algorithmss )).
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective optimization algorithm") OR ("modified df optimization algorithmss"))*.