Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
canh manh » lanh manh, cach mang, van manh
cua nhung » va nhung
dan toan » van toan, dan than, manh toan
van tuan » van quan, van ban, anh 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 - ((canh manh) or (canh tranh)) cua nhung cong ((dan toan) or (van tuan)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((canh manh) OR (canh tranh)) cua nhung cong ((dan toan) OR (van tuan)) cau.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((canh manh) or (canh tranh)) cua nhung cong ((dan toan) or (van tuan)) cau*.