Perhaps you should try some spelling variations:
thoat nuoc » thuat nuoi
hieu quan » lieu quan, thien quan, lien quan
luu tre » luu tru, luy tre
hanh di » hanh vi, hanh de, hang di
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
sac ky » cac ky, sai ky
te sac » te sach, te cac, te 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 sac ky lang xa hoi. ((hieu quan) or (hieu qua)) thoat nuoc va hanh di ((luu tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. ((hieu quan) OR (hieu qua)) thoat nuoc va hanh di ((luu tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. ((hieu quan) or (hieu qua)) thoat nuoc va hanh di ((luu tre) or (cuu tre))*.