Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
toc sach » hoc sach, doc sach, thuoc sach
hung cho » chung cho, huong cho, dung cho
hieu van » hieu va, thien van, lieu va
van hanh » ban hanh, van anh, van ban
sach tu » sach thu, cach tu, sach ty
tu hung » tu chung, tu nhung, tu vung
cho hoc » co hoc, khoa hoc
van cac » van hac, van cau, van bac
cac xuc » cam xuc, cac nuoc, chat xuc
cua cau » cua cac, cua chu, cua cay
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc sach tu hung cho hoc. hieu van cac xuc ((van hanh) or (van thanh)) di cua cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc sach tu hung cho hoc. hieu van cac xuc ((van hanh) OR (van thanh)) di cua cau*.