Perhaps you should try some spelling variations:
thanh tung » thanh cong
dung cong » dung trong
ho trieu » mot trieu, 25 trieu, ho chieu
30 trieu » 25 trieu
tung qua » dung qua, tuong quan, trung quan
qua dung » quang dung, su dung, qua song
tac toan » tap toan, tam toan, hach toan
tap quan » tac quan, hai quan

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho trieu) OR (30 trieu)) tinh - thanh tung qua dung cong ((tac toan) or (tap quan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho trieu) OR (30 trieu)) tinh - thanh tung qua dung cong ((tac toan) OR (tap quan)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho trieu) OR (30 trieu)) tinh - thanh tung qua dung cong ((tac toan) or (tap quan)) cau".
• Adding a wildcard symbol may retrieve word variants: ((ho trieu) OR (30 trieu)) tinh - thanh tung qua dung cong ((tac toan) or (tap quan)) cau*.