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

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