Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
hieu quan » lieu quan, thien quan, lien quan
va danh » va dinh, va dan, dia danh
va hanh » van hanh, va thanh, ban hanh
lua tre » cua tre, luy tre, dua tren
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
ban ky » van ky, dan ky
vi lua » vi luu
te ban » te bao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ban ky lang xa hoi. ((hieu quan) or (hieu qua)) tham nuoc ((va hanh) OR (va danh)) vi lua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ban ky lang xa hoi. ((hieu quan) OR (hieu qua)) tham nuoc ((va hanh) OR (va danh)) vi lua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ban ky lang xa hoi. ((hieu quan) or (hieu qua)) tham nuoc ((va hanh) OR (va danh)) vi lua tre".
• Adding a wildcard symbol may retrieve word variants: te ban ky lang xa hoi. ((hieu quan) or (hieu qua)) tham nuoc ((va hanh) OR (va danh)) vi lua tre*.