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

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 optimisation algorithm ) or ( de nhan sach algorithm ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( modified objective optimisation algorithm ) OR ( de nhan sach algorithm )).
• Adding a wildcard symbol may retrieve word variants: (( modified objective optimisation algorithm ) or ( de nhan sach algorithm ))*.