Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
tham soc » cham soc, tham nuoc, thai son
sach ky » sac ky, sach y, sach ty
luu tre » luu tru, cuu tre
va hanh » van hanh, va thanh, va danh
te sach » toc sach
lang xa » lang ha, dang xay, lang van
ky lang » ky nang, ky dang, ky tang
luy tre » luyen tre
soc va » hoc va, loc va, doc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky lang xa hoi. ((hieu quan) or (hieu qua)) tham soc va hanh vi ((luu tre) or (luy tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky lang xa hoi. ((hieu quan) OR (hieu qua)) tham soc va hanh vi ((luu tre) OR (luy tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. ((hieu quan) or (hieu qua)) tham soc va hanh vi ((luu tre) or (luy tre))*.