Perhaps you should try some spelling variations:
estimates algorithms » estimation algorithms, estimation algorithm, optimized algorithms
parameter estimates » parameter estimation
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
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.

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