Perhaps you should try some spelling variations:
nham thuc » nhan thuc, nam thuc, nham thu
cua viet » ca viet, hoa viet, cua vat
thuc ban » thuoc ban, thuc dan, thu ban
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
ky dang » ky danh
vai cua » dai cua, hai cua, lai cua
tay hoi » tay ho, tao hoi, tay thai
hieu va » hieu qua
tu sac » tu sach, tu cac, tu san

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sac ((ky dang) OR (ky nang)) tay hoi. ((hieu va) or (lieu va)) nham thuc ban hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky dang) OR (ky nang)) tay hoi. ((hieu va) OR (lieu va)) nham thuc ban hanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky dang) OR (ky nang)) tay hoi. ((hieu va) or (lieu va)) nham thuc ban hanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky dang) OR (ky nang)) tay hoi. ((hieu va) or (lieu va)) nham thuc ban hanh vai cua viet*.