Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
sang tao » hang tai
cac cong » cua cong
cong ban » cong bang, cong san, cong tan
thanh vi » hanh vi, thanh va, thanh ve
cua viet » ca viet, hoa viet, cua dieu
ky sang » ky nang, ky dang, ky tang
tao hoi » tao khoi, tao boi, tay hoi
qua cac » cua cac
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky sang tao hoi. hieu qua cac cong ban thanh vi ((cua viet) OR (cua vat))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sac ky sang tao hoi. hieu qua cac cong ban thanh vi ((cua viet) OR (cua vat))".
• Adding a wildcard symbol may retrieve word variants: te sac ky sang tao hoi. hieu qua cac cong ban thanh vi ((cua viet) OR (cua vat))*.