Perhaps you should try some spelling variations:
tham thuc » nham thuc, pham thuc, tam thuc
cua viet » ca viet, hoa viet, cua vat
hanh vai » hanh vi, hanh va, hanh tai
ban hanh » ban hang
thuc ban » thuoc ban, thuc dan, thu ban
ky dang » ky nang, ky danh
xay hoi » tay hoi, cay phoi, gay thoi
vai cua » dai cua, hai cua, lai cua
hieu va » hieu qua
tu sac » tu sach, tu cac, tu 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: tu sac ky dang ((xay hoi) OR (xa hoi)). ((hieu va) or (lieu va)) tham thuc ban hanh vai cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ky dang ((xay hoi) OR (xa hoi)). ((hieu va) OR (lieu va)) tham thuc ban hanh vai cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky dang ((xay hoi) OR (xa hoi)). ((hieu va) or (lieu va)) tham thuc ban hanh vai cua viet".
• Adding a wildcard symbol may retrieve word variants: tu sac ky dang ((xay hoi) OR (xa hoi)). ((hieu va) or (lieu va)) tham thuc ban hanh vai cua viet*.