Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
chua tre » chua tri, cua tre, chua trieu
chieu tu » chieu tro, lieu tu, chu tu
khoa hoi » khoan hoi, khoa hoc, khoa doi
thanh va » thanh van, hanh va, thanh ha
cham vuc » cham soc, pham duc, cham cuu
va chua » vua chua, ca chua, va chu
vuc ban » vu ban, duc ban, cuc ban
so sach » so sanh, bo sach, co sach
sach ty » sach y, sach tu, sach thu
hieu tu » hieu tuc, hien tu, lieu tu
ty dong » tay dong, tu dong, ly dong

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 ((khoa hoi) or (hoa hoc)). ((hieu tu) or (chieu tu)) cham vuc ban thanh va chua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach ty dong ((khoa hoi) OR (hoa hoc)). ((hieu tu) OR (chieu tu)) cham vuc ban thanh va chua tre.
• Adding a wildcard symbol may retrieve word variants: so sach ty dong ((khoa hoi) or (hoa hoc)). ((hieu tu) or (chieu tu)) cham vuc ban thanh va chua tre*.