Perhaps you should try some spelling variations:
"modified network optimization algorithms" » "modified network optimisation algorithm", "modified network estimation algorithms", "modified network estimation algorithm", "certified network optimization algorithms", "defined network optimization algorithms", "modified near optimization algorithms"
"modified learning method algorithm" » "mobile learning method algorithm", "modified caging method algorithm", "modified learning mom algorithm", "modified learning methods algorithm", "modified graining methods algorithm", "modified learning emotion algorithm"

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

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