Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified dorca convolution algorithms" » "modified dorca evolution algorithm", "modified dorca solution algorithm", "modified orca convolution algorithms"

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 estimation algorithm") or ("modified dorca convolution algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective estimation algorithm") OR ("modified dorca convolution algorithms")).
• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithm ) or ( modified dorca convolution algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective estimation algorithm") or ("modified dorca convolution algorithms"))*.