Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh va » thanh van, hanh va, thanh ha
tac dong » tac dung, tac trong, ha dong
cham vuc » cham soc, pham duc, cham cuu
so sach » so sanh, bo sach, co sach
vuc van » duc van, luc van, thuc van
tu cham » toc cham, thi cham
hieu tu » chieu tu, hieu tuc, hien tu
cua tre » cua te, cuu tre, cua triet
hoa hoi » khoa hoi, hoa doi, hoc hoi
ty dong » tay dong, tu dong, ly dong
va cua » va chua, via cua, ca cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach ((ty dong) or (tac dong)) ((hoa hoi) or (hoa hoc)). hieu tu cham vuc van thanh va cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ((ty dong) OR (tac dong)) ((hoa hoi) OR (hoa hoc)). hieu tu cham vuc van thanh va cua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ((ty dong) or (tac dong)) ((hoa hoi) or (hoa hoc)). hieu tu cham vuc van thanh va cua tre*.