Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
tham soc » tham nuoc, thai son, ham so
te sach » toc sach
sach ky » sac ky, sach y, sach ty
ky lang » ky nang, ky dang, ky tang
lang xa » lang ha, dang xay, lang van
va hanh » van hanh, va thanh, va danh
luu tre » luu tru, cuu tre, luy tre
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 sach ky lang xa hoi. ((hieu quan) or (hieu qua)) ((tham soc) or (cham soc)) va hanh vi luu 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) OR (cham soc)) va hanh vi luu tre.
• Adding a wildcard symbol may retrieve word variants: te sach ky lang xa hoi. ((hieu quan) or (hieu qua)) ((tham soc) or (cham soc)) va hanh vi luu tre*.