Perhaps you should try some spelling variations:
dau cua » dai cua, day cua, cau cua
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach ty, sach kem
can xuc » cam xuc, chat xuc, can xung
hieu su » hieu sau, tieu su, hieu so
cao hoi » cau hoi, co hoi, cao hoc
cua tre » cua te, cuu tre, cua triet
su can » su van, su cao, tu can
va dan » ca dan, va dao, va dau

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 ky) or (sach y)) nang cao hoi. hieu su can xuc ((va hanh) or (va dan)) dau cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach y)) nang cao hoi. hieu su can xuc ((va hanh) OR (va dan)) dau cua tre.
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) or (sach y)) nang cao hoi. hieu su can xuc ((va hanh) or (va dan)) dau cua tre*.