Perhaps you should try some spelling variations:
"modified multiobjective estimation algorithm" » "modified multiobjective optimization algorithm"
"mapping forecasting mixed algorithm" » "mapping forecasting method algorithm", "mapping forecasting air algorithm", "mapping forecasting driven algorithm", "mapping forecasting winner 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 algorithm") OR ("mapping forecasting mixed algorithm"))~.
• Removing quotes may allow a broader search: (( modified multiobjective estimation algorithm ) or ( mapping forecasting mixed algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified multiobjective estimation algorithm") or ("mapping forecasting mixed algorithm"))*.