Perhaps you should try some spelling variations:
thanh trong » thanh trung, tranh trong, hanh trong
bang chung » dang hung, dung chung, bang cong
hieu lang » chieu sang, hieu quang, nhieu tang
trong qua » trong quan, thong qua, trong nha
qua dung » quang dung, su dung, qua song
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 trong qua dung trong ((bang chung) or (bang phuong)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho hieu lang - thanh trong qua dung trong ((bang chung) OR (bang phuong)) cau*.