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