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