Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithms" » "modified multiobjective optimization algorithms", "modified multiobjective estimation algorithm", "modified multiobjective optimisation algorithm"
"modified adaptive ventilation algorithm" » "modified adaptive estimation algorithm", "modified adaptive evolution algorithm", "modified adaptive quantization algorithm", "modified invasive ventilation algorithm", "modified passive ventilation algorithm"

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 multiobjective estimation algorithms") OR ("modified adaptive ventilation algorithm"))~.
• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithms ) or ( modified adaptive ventilation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective estimation algorithms") or ("modified adaptive ventilation algorithm"))*.