Perhaps you should try some spelling variations:
"modified parameter optimizer algorithms" » "modified parameter optimized algorithms", "modified parameter optimized algorithm", "modified parameter optimization algorithms"
"modified learning emotion algorithm" » "mobile learning emotion algorithm", "modified caging emotion algorithm", "modified learning evolution algorithm", "modified learning estimation algorithm", "modified learning predation algorithm", "modified learning method 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 emotion algorithm") or ("modified parameter optimizer algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified learning emotion algorithm") OR ("modified parameter optimizer algorithms")).
• Removing quotes may allow a broader search: (( modified learning emotion algorithm ) or ( modified parameter optimizer algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified learning emotion algorithm") or ("modified parameter optimizer algorithms"))*.