Perhaps you should try some spelling variations:
tien thanh » tien thinh, den thanh
tran thanh » ban thanh, van thanh, quan thanh
hanh trang » thanh trung, canh tranh, hanh trinh
trang va » tran van, hang va
cong dan » cong san, cong tan, cong dong
toan tap » toan ban
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 ((tien thanh) or (tran thanh)) - hanh trang va hang ((cong dan) OR (huong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien thanh) OR (tran thanh)) - hanh trang va hang ((cong dan) OR (huong dan)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien thanh) or (tran thanh)) - hanh trang va hang ((cong dan) OR (huong dan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien thanh) or (tran thanh)) - hanh trang va hang ((cong dan) OR (huong dan)) toan tap*.