Perhaps you should try some spelling variations:
"modified objective optimisation algorithm" » "modified objective optimization algorithms", "modified objective estimation algorithm", "modified objective estimation algorithms", "modified objective optimization algorithm", "modified multiobjective optimization algorithm"
"modified df evolution algorithms" » "modified df evolution algorithm", "modified df convolution algorithms", "modified df solution algorithm", "modified _ evolution algorithms", "modified co evolution algorithms", "modified adam evolution algorithms", "modified bi1 evolution algorithms"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified df evolution algorithms") or ("modified objective optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified df evolution algorithms") OR ("modified objective optimisation algorithm")).
• Removing quotes may allow a broader search: (( modified df evolution algorithms ) or ( modified objective optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified df evolution algorithms") or ("modified objective optimisation algorithm"))*.