Perhaps you should try some spelling variations:
hoi nang » hoi lang, ho nang, hoa nang
qua cham » qua hai, qua cac, va cham
hanh hoi » hanh thoi, hanh noi, hanh hoa
tu sach » thu sach, su sach, tu cach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
soc van » hoc van, sac van, soc dan
hoi cua » hoi chuc
cua tre » cua te, cuu tre, cua triet
oc van » hoc van, luoc van, quoc van

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: ((tu sach) OR (te sach)) hoi nang xa hoi. hieu qua cham ((soc van) OR (oc van)) hanh hoi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) hoi nang xa hoi. hieu qua cham ((soc van) or (oc van)) hanh hoi cua tre~".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) hoi nang xa hoi. hieu qua cham ((soc van) or (oc van)) hanh hoi cua tre*.