Perhaps you should try some spelling variations:
"modified location estimation algorithmssss" » "modified location estimation algorithms", "modified location estimation algorithm", "modified motion estimation algorithmssss", "modified carbon estimation algorithmssss"
"modified objective optimization algorithm" » "modified multiobjective optimization algorithm", "modified objective optimization algorithms", "modified objective optimisation algorithm", "modified objective estimation algorithm"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (("modified objective optimization algorithm") or ("modified location estimation algorithmssss"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified objective optimization algorithm") OR ("modified location estimation algorithmssss")).
• Removing quotes may allow a broader search: (( modified objective optimization algorithm ) or ( modified location estimation algorithmssss )).
• Adding a wildcard symbol may retrieve word variants: (("modified objective optimization algorithm") or ("modified location estimation algorithmssss"))*.