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