Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
dung duong » dung dong, dong duong, dung dung
hoc thieu » toc thieu, hoc hien
tranh cua » doanh cua
van thanh » ban thanh, van tuan
manh cua » doanh cua, ban cua
van toan » van tuan, van tan, manh toan

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 - hanh ((tranh cua) or (manh cua)) dung duong ((van toan) or (van thanh)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - hanh ((tranh cua) OR (manh cua)) dung duong ((van toan) OR (van thanh)) cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - hanh ((tranh cua) or (manh cua)) dung duong ((van toan) or (van thanh)) cao*.