Perhaps you should try some spelling variations:
optimization algorithms » optimisation algorithm, estimation algorithms, estimation algorithm
optimized algorithm » optimized algorithms, optimizer algorithms
designed network » defined network
df optimized » _ optimized, _ optimize
modified df » modified _, modified adam, modified bi1

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( designed network optimization algorithms ) or ( modified df optimized algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( designed network optimization algorithms ) OR ( modified df optimized algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( designed network optimization algorithms ) or ( modified df optimized algorithm ))*.