Perhaps you should try some spelling variations:
cham dua » chay dua, cham giua, pham duc
ban hang » ngan hang
lai cua » dai cua, hai cua, lai chau
vai cua » dai cua, hai cua, bai cua
dua ban » dia ban, cua ban, qua ban
ve cham » va cham, ve chat, vu cham
hieu ve » hieu va, hieu van
mai hoi » mai khoi, dai hoi, lai hoi
sai ky » sac ky
me hoi » le hoi
tu sai » tu bai, tu san, tu cai

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sai ky nang ((me hoi) or (mai hoi)). hieu ve cham dua ban hang ((vai cua) OR (lai cua)) viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang ((me hoi) OR (mai hoi)). hieu ve cham dua ban hang ((vai cua) OR (lai cua)) viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang ((me hoi) or (mai hoi)). hieu ve cham dua ban hang ((vai cua) OR (lai cua)) viet".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang ((me hoi) or (mai hoi)). hieu ve cham dua ban hang ((vai cua) OR (lai cua)) viet*.