Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, hanh trinh
hieu lang » chieu sang, hieu quang, nhieu tang
thanh lap » thanh san, phan lap, thanh hai
trang va » tran van, hang va
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
than cau » toan cau, phan cau, than cap
ho hieu » ho chieu, hoi hieu, nho hieu
va lang » va nang, hoa lang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho hieu lang - hanh trang va lang ((cong dan) OR (cong san)) ((than cau) or (thanh lap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - hanh trang va lang ((cong dan) OR (cong san)) ((than cau) OR (thanh lap)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - hanh trang va lang ((cong dan) OR (cong san)) ((than cau) or (thanh lap))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - hanh trang va lang ((cong dan) OR (cong san)) ((than cau) or (thanh lap))*.