Perhaps you should try some spelling variations:
doanh thanh » danh thanh, dinh thanh, dong thanh
thieu sang » chieu sang, thieu khang, thieu quang
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
tan toan » tan tran, tap toan, dan toan
van toan » van tuan, van tan, van thanh

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 - ((doanh thanh) or (doanh nhan)) cua nhung cong ((tan toan) or (van toan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((doanh thanh) OR (doanh nhan)) cua nhung cong ((tan toan) OR (van toan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((doanh thanh) or (doanh nhan)) cua nhung cong ((tan toan) or (van toan)) cau*.