Perhaps you should try some spelling variations:
thanh trung » thanh tung
theo hieu » theo chieu, theo tieu, thien hieu
hieu lang » chieu sang, hieu quang, nhieu tang
trung dap » trung cap, trung dai, trung dam
dap luong » dai luong, da luong, do luong
cong dan » cong san, cong tan, cong dong
phan cau » phan dau, phan cac, phan lap

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