Perhaps you should try some spelling variations:
cac thuc » cach thuc, cac thu, can thuc
thuc ban » thuoc ban, thuc dan, thu ban
ban hanh » ban hang
hanh lai » hanh lam, hanh tai, thanh lap
do danh » do dinh, do sanh, dia danh
hieu va » lieu va, hieu qua
lai cua » dai cua, hai cua, lai chau
y tang » ky tang, 6 tang, 5 tang
7 tang » 6 tang
ma hoi » mai hoi, xa hoi, ma hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: do danh ((y tang) or (7 tang)) ma hoi. hieu va cac thuc ban hanh lai cua vat~.
• If you are trying to use Boolean operators, they must be ALL CAPS: do danh ((y tang) OR (7 tang)) ma hoi. hieu va cac thuc ban hanh lai cua vat*.