Perhaps you should try some spelling variations:
hieu quan » lieu quan, thien quan, lien quan
tham soc » cham soc, tham nuoc, thai son
van hanh » van thanh, ban hanh, van anh
luu tre » luu tru, cuu tre
soc van » hoc van, oc van, sac van
luy tre » luyen tre
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)) tham soc van hanh vi ((luu tre) or (luy 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)) tham soc van hanh vi ((luu tre) OR (luy tre)).
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. ((hieu quan) or (hieu qua)) tham soc van hanh vi ((luu tre) or (luy tre))*.