Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
van hanh » van thanh, ban hanh, van anh
tham soc » cham soc, tham nuoc, thai son
soc van » hoc van, oc van, sac van
lua tre » cua tre, luy tre, dua tren
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
te sach » toc sach
vi lua » vi luu
te sac » 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) or (te sach)) ky lang xa hoi. ((hieu quan) or (hieu qua)) tham soc van hanh vi lua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sac) OR (te sach)) ky lang xa hoi. ((hieu quan) OR (hieu qua)) tham soc van hanh vi lua tre.
• Adding a wildcard symbol may retrieve word variants: ((te sac) or (te sach)) ky lang xa hoi. ((hieu quan) or (hieu qua)) tham soc van hanh vi lua tre*.