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

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