Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
trung gian » truong giang, truong giao, trong giang
hoc thieu » toc thieu, hoc hien
gian vung » gian muong, gian lang
vung cong » dung cong, vung dong, vung song
van thanh » ban thanh, van tuan

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc thieu sang - thanh trung gian vung cong ((tinh toan) or (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung gian vung cong ((tinh toan) OR (van thanh)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung gian vung cong ((tinh toan) or (van thanh)) cau*.