Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
hieu quan » lieu quan, thien quan, lien quan
va thanh » gia thanh, ban thanh, va tinh
van hanh » van thanh, ban hanh, van anh
dua tren » dung tren
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
san ky » sang ky, van ky, dan ky
vi dua » vi du, vi dum, vi lua
te san » te ban, ke san, 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: te san ky lang xa hoi. ((hieu quan) or (hieu qua)) tham nuoc ((van hanh) or (va thanh)) vi dua tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te san ky lang xa hoi. ((hieu quan) OR (hieu qua)) tham nuoc ((van hanh) OR (va thanh)) vi dua tren.
• Adding a wildcard symbol may retrieve word variants: te san ky lang xa hoi. ((hieu quan) or (hieu qua)) tham nuoc ((van hanh) or (va thanh)) vi dua tren*.