Perhaps you should try some spelling variations:
thanh trung » thanh tung
hanh trang » canh tranh, hanh trinh, minh trang
tieu sang » chieu sang, tieu dung, tiem nang
dung cong » dung trong
tran chau » tranh chap, tran huu
van dung » van dong, xay dung, tin dung
cong tan » cong tac, cong san, cong thanh
tra cau » tra sau, ta cau, tra cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - ((hanh trang) OR (thanh trung)) van dung cong tan ((tra cau) or (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - ((hanh trang) OR (thanh trung)) van dung cong tan ((tra cau) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo tieu sang - ((hanh trang) OR (thanh trung)) van dung cong tan ((tra cau) or (tran chau))".
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - ((hanh trang) OR (thanh trung)) van dung cong tan ((tra cau) or (tran chau))*.