Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
ban hanh » ban hang
cham tuc » nham thuc, pham thuc, tham thuc
lai hoi » dai hoi, lai hoa, lai roi
tuc ban » thuc ban, truc ban, tu ban
va cham » va chat, va tham
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, mai doi
sach v » sach va, sach y, sach vay
sach 2 » sach y
vi cua » vai cua, di cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach v) OR (sach 2)) tang ((mai hoi) or (lai hoi)). hieu va cham tuc ban hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach v) OR (sach 2)) tang ((mai hoi) OR (lai hoi)). hieu va cham tuc ban hanh vi cua viet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach v) OR (sach 2)) tang ((mai hoi) or (lai hoi)). hieu va cham tuc ban hanh vi cua viet*".