Perhaps you should try some spelling variations:
"modified objective optimizer algorithms" » "modified objective optimized algorithms", "modified objective optimized algorithm", "modified objective optimization algorithms", "modified objective optimal algorithms"
"modified changing estimation algorithm" » "modified channel estimation algorithm", "modified charging station algorithm", "modified caging estimation 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 objective optimizer algorithms") OR ("modified changing estimation algorithm"))~.
• Removing quotes may allow a broader search: (( modified objective optimizer algorithms ) or ( modified changing estimation algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimizer algorithms") or ("modified changing estimation algorithm"))*.