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"

You may be able to get more results by adjusting your search query.

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