Perhaps you should try some spelling variations:
"modified stochastic optimization algorithms" » "modified stochastic optimisation algorithm", "modified stochastic estimation algorithms", "modified stochastic estimation algorithm"
"modified allocation estimation algorithmss" » "modified allocation estimation algorithms", "modified allocation estimation algorithm", "modified allocation optimization algorithmss", "modified motion estimation algorithmss"

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