Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
khong cong » thong cong, khong cang, chong cong
hoc thieu » toc thieu, hoc hien
trung hay » trung ha, trung hai, trung gay
hay khong » bay khong, hang khong, hoac khong
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 hay khong cong ((((tinh toan) or (anh tuan))) or (van thanh)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung hay khong cong ((((tinh toan) OR (anh tuan))) OR (van thanh)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh trung hay khong cong ((((tinh toan) or (anh tuan))) or (van thanh)) cau*.