Perhaps you should try some spelling variations:
"modified multiobjective optimizer algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective optimized algorithms", "modified multiobjective optimized algorithm"
"model using search algorithm" » "model using source algorithm", "model using egarch algorithm", "model nursing research algorithm", "model using servo algorithm", "code using search algorithm", "models nursing search algorithm", "powder using search 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 optimizer algorithms") or ("model using search algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified multiobjective optimizer algorithms") OR ("model using search algorithm")).
• Removing quotes may allow a broader search: (( modified multiobjective optimizer algorithms ) or ( model using search algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective optimizer algorithms") or ("model using search algorithm"))*.