Perhaps you should try some spelling variations:
"modified network optimization algorithms" » "modified network optimisation algorithm", "modified network estimation algorithms", "modified network optimized algorithms", "certified network optimization algorithms", "defined network optimization algorithms", "modified near optimization algorithms"
"mapping learning estimation algorithm" » "mapping learning emotion algorithm", "mapping lighting estimation algorithm", "machine learning estimation algorithm", "enabling learning estimation algorithm"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("mapping learning estimation algorithm") OR ("modified network optimization algorithms"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"mapping learning estimation algorithm\") OR (\"modified network optimization algorithms\"))".
• Removing quotes may allow a broader search: (( mapping learning estimation algorithm ) OR ( modified network optimization algorithms )).
• Adding a wildcard symbol may retrieve word variants: (("mapping learning estimation algorithm") OR ("modified network optimization algorithms"))*.