Perhaps you should try some spelling variations:
hieu lang » chieu sang, hieu quang, nhieu tang
trung cua » truong cua, trung tuan, dung cua
trung cap » truong cao, trung tam
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
toan cau » toan cao, toan ban, toan tap
ho hieu » ho chieu, hoi hieu, nho hieu

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 - thanh ((trung cua) or (trung cap)) nhung ((cong dan) OR (cong tan)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh ((trung cua) OR (trung cap)) nhung ((cong dan) OR (cong tan)) toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh ((trung cua) or (trung cap)) nhung ((cong dan) OR (cong tan)) toan cau".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh ((trung cua) or (trung cap)) nhung ((cong dan) OR (cong tan)) toan cau*.