Perhaps you should try some spelling variations:
"modified multiobjective optimization algorithms" » "modified multiobjective optimisation algorithm", "modified multiobjective estimation algorithms", "modified multiobjective estimation algorithm"
"code using force algorithm" » "code using source algorithm", "code using search algorithm", "code using morse algorithm", "code cutting force algorithm", "core using force algorithm"

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

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