Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hang cong » dang cong, hang nong, bang cong
khi sach » khi sac, khoa sach, khau sach
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
than cau » toan cau, than cap, thanh chau
phan cau » phan dau, phan cac, phan tu
va hang » van hang, va nang, va lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi khi sach - hanh trang va hang cong dan ((than cau) or (phan cau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi khi sach - hanh trang va hang cong dan ((than cau) OR (phan cau)).
• Adding a wildcard symbol may retrieve word variants: doi khi sach - hanh trang va hang cong dan ((than cau) or (phan cau))*.