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
hieu ve » hieu van
sang ma » tang ma, nang ma, sang tao
ky sang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
ma hoi » mai hoi, xa hoi, ma hoa
tuc va » thuc va, truc va, tuc xa
va dan » ca dan, va dao, va dau
vi cua » di cua
tu sac » tu sach, tu cac, tu san

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 sang ma hoi. ((hieu ve) OR (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 sac ky sang ma hoi. ((hieu ve) OR (hieu va)) cham tuc va dan ((vi cua) OR (vai cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ky sang ma hoi. ((hieu ve) OR (hieu va)) cham tuc va dan ((vi cua) or (vai cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ky sang ma hoi. ((hieu ve) OR (hieu va)) cham tuc va dan ((vi cua) or (vai cua)) tre*.