Perhaps you should try some spelling variations:
cham duc » pham duc, cham soc, pham duy
te sach » toc sach
hien tu » khien tu, dien tu
danh de » hanh de, dang de, danh di
sach tu » sach thu, cach tu, sach ty
hieu tu » chieu tu, hieu tuc, lieu tu
tu nang » tru nang, tu nong, tu nano
su tien » su kien, su hien, tu tieng
nang o » nang co, nang ho, nang ro
dan de » dan den, dang de, van de
o hoi » co hoi, o hoc, o hai

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 tu nang o hoi. ((hieu tu) OR (hien tu)) cham duc va ((danh de) OR (dan de)) su tien~.
• Adding a wildcard symbol may retrieve word variants: te sach tu nang o hoi. ((hieu tu) or (hien tu)) cham duc va ((danh de) or (dan de)) su tien*.