Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
hoc sach » hoc sinh, hoc cac, hoc anh
thanh ca » thanh cha, thanh cac, thanh ha
dung hoa » dung khoa, duong hoa, dung hoai
cua tre » cua te, cua triet, dua tren
xuc ban » duc ban, cuc ban, quoc ban
cuu tre » cau tren, cau treo
hieu tu » chieu tu, hieu tuc, hien tu
hoa hoi » khoa hoi, hoa hoc, hoa doi
ly dung » ly dong, xay dung, ly khung
co sach » bo sach, cuon sach
tu cam » tu cham, tu cac, tu nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc sach) or (co sach)) ly dung hoa hoi. hieu tu cam xuc ban thanh ca ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc sach) OR (co sach)) ly dung hoa hoi. hieu tu cam xuc ban thanh ca ((cua tre) OR (cuu tre)).
• Adding a wildcard symbol may retrieve word variants: ((hoc sach) or (co sach)) ly dung hoa hoi. hieu tu cam xuc ban thanh ca ((cua tre) or (cuu tre))*.