Perhaps you should try some spelling variations:
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trung cap » truong cao, trung tam
tran tuan » tran xuan, tran quang, tran thanh
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
phan cau » phan dau, phan cac, phan tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo hieu lang - thanh ((trung cap) or (tran tuan)) thuong ((cong dan) OR (cong tan)) phan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh ((trung cap) OR (tran tuan)) thuong ((cong dan) OR (cong tan)) phan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo hieu lang - thanh ((trung cap) or (tran tuan)) thuong ((cong dan) OR (cong tan)) phan cau".
• Adding a wildcard symbol may retrieve word variants: theo hieu lang - thanh ((trung cap) or (tran tuan)) thuong ((cong dan) OR (cong tan)) phan cau*.