Perhaps you should try some spelling variations:
tham nuoc » thay nuoc, thoat nuoc, nha nuoc
hieu quan » lieu quan, thien quan, lien quan
lang van » dang van, tang van, hoang van
va hanh » van hanh, va thanh, va danh
luy tre » luyen tre
van hoi » van hoa, van hoc, van hoe
ky lang » ky nang, ky dang, ky tang
te lai » te tai, te bai
vi luy » vi lua, vi luu
te sai » te tai, te bai, te hai

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

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