Perhaps you should try some spelling variations:
estimates algorithm » estimation algorithm, estimation algorithms
parameter estimates » parameter estimation
two algorithm » mom algorithm, our algorithm
_ algorithm » _ algorithms, _ algorithmic, mom algorithm
code based » model based, coal based, income based

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: (( code based ((two algorithm) OR (_ algorithm)) ) OR ( modified parameter estimates algorithm ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( code based ((two algorithm) OR (_ algorithm)) ) or ( modified parameter estimates algorithm ))~".
• Adding a wildcard symbol may retrieve word variants: (( code based ((two algorithm) OR (_ algorithm)) ) or ( modified parameter estimates algorithm ))*.