Perhaps you should try some spelling variations:
tang tao » sang tao, tang tai, nang tao
nam thuc » nam thuoc, nam thu, nam tu
cua viet » ca viet, cua vat, cua dieu
ky tang » ky nang, ky dang, kho tang
tao hoi » tao khoi, tao boi, tay hoi
hieu le » hieu ve, hieu he, hieu ly
va hanh » van hanh, va thanh, va danh
su sac » su sach, su cac, su xac
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: su sac ky tang tao hoi. hieu le ((nam thuc) or (am thuc)) va hanh vi ((cua viet) or (hoa viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky tang tao hoi. hieu le ((nam thuc) OR (am thuc)) va hanh vi ((cua viet) OR (hoa viet)).
• Adding a wildcard symbol may retrieve word variants: su sac ky tang tao hoi. hieu le ((nam thuc) or (am thuc)) va hanh vi ((cua viet) or (hoa viet))*.