Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"modified caging optimization algorithmss" » "modified caging optimization algorithms", "modified caging optimisation algorithm", "modified caging estimation algorithms", "modified staffing optimization algorithmss"

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