Perhaps you should try some spelling variations:
cham tuc » nham thuc, pham thuc, tham thuc
vai cua » dai cua, hai cua, lai cua
hieu va » lieu va, hieu qua
va cham » va chat, va tham
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, ma hoa, me hoi
sai ky » sac ky
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
vi cua » di cua
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 sang ((ma hoi) or (xa hoi)). hieu va cham tuc va dan ((vi cua) or (vai cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky sang ((ma hoi) OR (xa hoi)). hieu va cham tuc va dan ((vi cua) OR (vai cua)) tre.
• Adding a wildcard symbol may retrieve word variants: tu sai ky sang ((ma hoi) or (xa hoi)). hieu va cham tuc va dan ((vi cua) or (vai cua)) tre*.