Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
thay nuoc » tham nuoc, tray nuoc, thoat nuoc
van hanh » van thanh, van anh, van ban
ban hanh » ban hang
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
luu tre » luu tru, cuu tre, luy tre
te sai » te tai, te bai, te lai
sai ky » sac ky
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 sai ky lang xa hoi. ((hieu quan) or (hieu qua)) thay nuoc ((van hanh) OR (ban hanh)) vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sai ky lang xa hoi. ((hieu quan) OR (hieu qua)) thay nuoc ((van hanh) OR (ban hanh)) vi luu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sai ky lang xa hoi. ((hieu quan) or (hieu qua)) thay nuoc ((van hanh) OR (ban hanh)) vi luu tre".
• Adding a wildcard symbol may retrieve word variants: te sai ky lang xa hoi. ((hieu quan) or (hieu qua)) thay nuoc ((van hanh) OR (ban hanh)) vi luu tre*.