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