Perhaps you should try some spelling variations:
objective optimization » multiobjective optimization
optimization algorithm » optimization algorithms, optimisation algorithm, estimation algorithm
sach algorithm » search algorithm, graph algorithms, source algorithm
code nhan » cong nhan, de nhan
nhan sach » ngan sach, nhan cach, nhan sinh

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

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