Perhaps you should try some spelling variations:
thuat sach » thuat lanh, thuat san
cong thanh » dong thanh, cong trinh, cong tan
hoc thuat » hoc thuyet, hoc thuc, hoc chat
chua dong » cua dong, huy dong, hoa dong
thanh ban » thanh san, thanh van, thanh bac
ha dong » hoat dong, van dong
ban can » ban dan, ban hang, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thuat sach - canh tranh ((chua dong) or (ha dong)) cong thanh ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thuat sach - canh tranh ((chua dong) OR (ha dong)) cong thanh ban can.
• Adding a wildcard symbol may retrieve word variants: hoc thuat sach - canh tranh ((chua dong) or (ha dong)) cong thanh ban can*.