Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
cong ngang » cong nhan, cong quang, cong lang
hoc thieu » toc thieu, hoc hien
thanh tra » thanh toan, thanh hoa
tuan hung » tran hung, luan hung, tuan dung
cong vang » cong lang, cong quang, cong dong
tra tuan » tran tuan, tra quan, tri tuan
cong san » cong tac
toan cao » toan ban, toan tap

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 tra tuan hung ((((cong vang) OR (cong san))) or (cong ngang)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tra tuan hung ((((cong vang) OR (cong san))) OR (cong ngang)) toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh tra tuan hung ((((cong vang) OR (cong san))) or (cong ngang)) toan cao".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - thanh tra tuan hung ((((cong vang) OR (cong san))) or (cong ngang)) toan cao*.