Perhaps you should try some spelling variations:
chat soc » cham soc, chat hoc, chat doc
van hanh » van thanh, ban hanh, van anh
sach thu » sach thue, sach tham, cach thuc
cua tre » cuu tre, cua triet, dua tren
hanh va » hang va, hanh vi
soc van » hoc van, oc van, sac van
va chat » van chat, va phat, cao chat
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach thu) OR (sach thieu)) nang xa hoi. hieu va chat soc van hanh va ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach thu) OR (sach thieu)) nang xa hoi. hieu va chat soc van hanh va ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: te ((sach thu) OR (sach thieu)) nang xa hoi. hieu va chat soc van hanh va ((cua tre) or (cua te))*.