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"
"code graining methods algorithm" » "code learning methods algorithm", "code learning method algorithm", "code making methods algorithm", "coarse graining methods 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 ("code graining methods algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified network optimization algorithms") OR ("code graining methods algorithm")).
• Removing quotes may allow a broader search: (( modified network optimization algorithms ) or ( code graining methods algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified network optimization algorithms") or ("code graining methods algorithm"))*.