Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
solutions algorithm » solution algorithm, evolution algorithm, evolutionary algorithm
passive solutions » positive solutions
modified passive » modified adaptive
modified network » certified network, defined network, modified near

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified passive solutions algorithm ) OR ( modified network optimization algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified passive solutions algorithm ) or ( modified network optimization algorithms ))*.