Perhaps you should try some spelling variations:
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
hieu lang » chieu sang, hieu quang, nhieu tang
cua thong » cua thuong, cua khong, cua tong
tung cua » trung cua, tuong cua, dung cua
cong dan » cong san, cong tan, huong dan
than cau » phan cau, than cap, thanh chau
toan cau » toan cao, toan ban, toan tai
toan tap » toan ban
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 tung cua thong cong dan ((than cau) or (((toan cau) or (toan tap))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tung cua thong cong dan ((than cau) OR (((toan cau) OR (toan tap)))).
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tung cua thong cong dan ((than cau) or (((toan cau) or (toan tap))))*.