Perhaps you should try some spelling variations:
parameter estimates » parameter estimation
estimates algorithm » estimation algorithm, estimation algorithms
solution algorithm » evolution algorithm, convolution algorithms, evolutionary algorithm
modified aging » modified caging
aging solution » saline solution

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

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