Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
tham soc » cham soc, tham nuoc, thai son
ky lang » ky nang, ky dang, ky tang
lang ha » long ha
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
luu tre » luu tru, cuu tre, luy tre
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
ha hoi » hoa hoi, ha noi, xa hoi
soc va » hoc va, loc va, doc va
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 ha hoi. ((hieu quan) or (hieu qua)) tham soc va danh vi luu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang ha hoi. ((hieu quan) OR (hieu qua)) tham soc va danh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky lang ha hoi. ((hieu quan) or (hieu qua)) tham soc va danh vi luu tre*.