Perhaps you should try some spelling variations:
cau tren » cu tren, dau tren, ca tren
tham soc » cham soc, tham nuoc, thai son
lang xa » lang ha, dang xay, lang van
hieu va » lieu va
ky lang » ky nang, ky dang, ky tang
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
soc va » hoc va, loc va, doc va
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 va) or (hieu qua)) tham soc va hanh vi ((cua tre) or (cau tren))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky lang xa hoi. ((hieu va) OR (hieu qua)) tham soc va hanh vi ((cua tre) OR (cau tren)).
• Adding a wildcard symbol may retrieve word variants: te sac ky lang xa hoi. ((hieu va) or (hieu qua)) tham soc va hanh vi ((cua tre) or (cau tren))*.