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