Perhaps you should try some spelling variations:
"modified allocation optimization algorithmss" » "modified allocation optimization algorithms", "modified allocation optimisation algorithm", "modified allocation estimation algorithms", "modified location optimization algorithmss"
"modified passive quantization algorithms" » "modified passive estimation algorithms", "modified passive optimization algorithms", "modified adaptive quantization algorithms"

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 optimization algorithmss") or ("modified passive quantization algorithms"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified allocation optimization algorithmss") OR ("modified passive quantization algorithms")).
• Removing quotes may allow a broader search: (( modified allocation optimization algorithmss ) or ( modified passive quantization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("modified allocation optimization algorithmss") or ("modified passive quantization algorithms"))*.