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 evolution algorithm" » "modified df solution algorithm", "modified df evolutionary algorithm", "modified df convolution algorithms", "modified _ evolution algorithm", "modified co evolution algorithm", "modified adam evolution algorithm", "modified bi1 evolution 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 objective optimization algorithm") OR ("modified df evolution algorithm"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"modified objective optimization algorithm\") OR (\"modified df evolution algorithm\"))".
• Removing quotes may allow a broader search: (( modified objective optimization algorithm ) OR ( modified df evolution algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithm") OR ("modified df evolution algorithm"))*.