Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hang cong » dang cong, hang nong, bang cong
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
dan chan » dan gian, dan ca, van chat
chan ban » can ban, chat ban, chan nan
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: ((hoc hien) or (theo tieu)) xanh - hanh trang va hang cong dan chan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc hien) OR (theo tieu)) xanh - hanh trang va hang cong dan chan ban.
• Adding a wildcard symbol may retrieve word variants: ((hoc hien) or (theo tieu)) xanh - hanh trang va hang cong dan chan ban*.