Perhaps you should try some spelling variations:
"modified network estimation algorithms" » "modified network estimation algorithm", "modified network optimization algorithms", "modified network optimisation algorithm", "certified network estimation algorithms", "defined network estimation algorithms", "modified near estimation algorithms"
"modified stochastic solution algorithm" » "modified stochastic evolution algorithm", "modified stochastic convolution algorithms", "modified stochastic evolutionary algorithm"

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 network estimation algorithms") or ("modified stochastic solution algorithm"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("modified network estimation algorithms") OR ("modified stochastic solution algorithm")).
• Removing quotes may allow a broader search: (( modified network estimation algorithms ) or ( modified stochastic solution algorithm )).
• Adding a wildcard symbol may retrieve word variants: (("modified network estimation algorithms") or ("modified stochastic solution algorithm"))*.