Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
dung duong » dung dong, dong duong, dung dung
duong manh » duong van
hoc thieu » toc thieu, hoc hien
quan dung » quang dung, quan duong, qua dung
manh toan » thanh toan, anh tuan, tinh toan
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) OR (thanh tung)) quan dung duong manh toan ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((thanh trung) OR (thanh tung)) quan dung duong manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((thanh trung) OR (thanh tung)) quan dung duong manh toan ban*.