Perhaps you should try some spelling variations:
te sach » toc sach
sach tu » sach thu, cach tu, sach ty
dau cua » dai cua, day cua, cau cua
va daoh » va danh, va doanh
tu cham » toc cham, thi cham
vu cham » va cham, vu kham, qua cham
cao hoi » cau hoi, co hoi, cao hoc
tu nang » tru nang, tu nong, tu nano
cua tre » cua te, cuu tre, cua triet
va dao » ca dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach tu nang cao hoi. hieu ((vu cham) OR (tu cham)) xuc ((va daoh) or (va dao)) dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach tu nang cao hoi. hieu ((vu cham) OR (tu cham)) xuc ((va daoh) OR (va dao)) dau cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach tu nang cao hoi. hieu ((vu cham) OR (tu cham)) xuc ((va daoh) or (va dao)) dau cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach tu nang cao hoi. hieu ((vu cham) OR (tu cham)) xuc ((va daoh) or (va dao)) dau cua tre*.