Perhaps you should try some spelling variations:
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, thieu quang
quan nhung » qua nhung, luan chung, quang hung
hoc thieu » toc thieu, hoc hien
cua nhung » va nhung
cong manh » cong danh, duong manh, cong thanh
toan cau » toan cao, toan tap, toan tai
toan ban » van ban

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 ((quan nhung) OR (cua nhung)) cong manh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh trung ((quan nhung) OR (cua nhung)) cong manh ((toan cau) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh trung ((quan nhung) OR (cua nhung)) cong manh ((toan cau) or (toan ban))*".