Perhaps you should try some spelling variations:
estimation algorithms » estimation algorithm, optimization algorithms, optimisation algorithm
parameter estimation » parameter estimates, parameter optimization
du algorithm » our algorithm, _ algorithm, adam algorithm
code phap » de phap, che phap
phap du » phap dau, phap dun, phap tu

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 phap du algorithm ) OR ( modified parameter estimation algorithms ))~.
• Adding a wildcard symbol may retrieve word variants: (( code phap du algorithm ) or ( modified parameter estimation algorithms ))*.