Perhaps you should try some spelling variations:
"modified multiobjective optimisation algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithm", "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm"
"modified aging estimation algorithms" » "modified aging estimation algorithm", "modified aging optimization algorithms", "modified aging approximation algorithms", "modified lighting estimation algorithms", "modified risk estimation algorithms", "modified caging estimation algorithms"

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