Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu lang » chieu sang, hieu quang, nhieu tang
tran tuan » tran xuan, tran quang, tran thanh
tung cua » trung cua, tuong cua, dung cua
cua tong » cua cong, cua dong, cua nong
cong tan » cong tac, cong thanh, cong ty
cong san » cong tac
tran tap » toan tap, tran tan, trang tai
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 tong ((cong tan) or (cong san)) ((tran tap) OR (tran tuan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh tung cua tong ((cong tan) OR (cong san)) ((tran tap) OR (tran tuan)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho hieu lang - thanh tung cua tong ((cong tan) or (cong san)) ((tran tap) OR (tran tuan))".
• Adding a wildcard symbol may retrieve word variants: ho hieu lang - thanh tung cua tong ((cong tan) or (cong san)) ((tran tap) OR (tran tuan))*.