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
dung cong » dung trong
dap dung » ap dung, dan dung, dap ung
tai phan » tai thanh, tai phong, tai ngan
ty phan » ly phan, tu phan, tin phan

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 dung cong ((ty phan) or (tai phan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo hieu lang - thanh trung dap dung cong ((ty phan) OR (tai phan)) cau*.