Perhaps you should try some spelling variations:
parameters optimization » parameter optimization, parameter estimation
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
sach algorithm » search algorithm, graph algorithms, source algorithm
code nam » cong nam
nam sach » ngan sach, nam danh, nam sao

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 nam sach algorithm ) OR ( modified parameters optimization algorithm ))~.
• Adding a wildcard symbol may retrieve word variants: (( code nam sach algorithm ) or ( modified parameters optimization algorithm ))*.