Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
hieu quan » lieu quan, thien quan, lien quan
ky lang » ky dang, ky tang, tay lang
va hanh » van hanh, va thanh, va danh
luu tre » luu tru, cuu tre, luy tre
te sac » te sach, te cac, te san
vi luu » vi lua

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

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