Perhaps you should try some spelling variations:
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
one approximation » time approximation, _ approximation, rough approximations
modified one » modified male, modified near, modified orca
modified df » modified _, modified adam, modified bi1
df solution » _ solution, drug solution, up solutions

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 one approximation algorithms ) OR ( modified df solution algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( modified one approximation algorithms ) or ( modified df solution algorithm ))*.