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 learning estimation algorithm" » "modified learning emotion algorithm", "modified lighting estimation algorithm", "mobile learning estimation algorithm", "modified caging 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 learning estimation algorithm") or ("modified parameter optimisation algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified learning estimation algorithm") OR ("modified parameter optimisation algorithm")).
• Removing quotes may allow a broader search: (( modified learning estimation algorithm ) or ( modified parameter optimisation algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified learning estimation algorithm") or ("modified parameter optimisation algorithm"))*.