Perhaps you should try some spelling variations:
"modified sphere estimation algorithmss" » "modified sphere estimation algorithms", "modified sphere estimation algorithm", "modified sphere optimization algorithms", "modified pose estimation algorithmss"
"modified bayesian optimization algorithm" » "modified bayesian optimization algorithms", "modified bayesian optimisation algorithm", "modified bayesian 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 sphere estimation algorithmss") or ("modified bayesian optimization algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified sphere estimation algorithmss") OR ("modified bayesian optimization algorithm")).
• Removing quotes may allow a broader search: (( modified sphere estimation algorithmss ) or ( modified bayesian optimization algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified sphere estimation algorithmss") or ("modified bayesian optimization algorithm"))*.