Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
thieu sang » chieu sang, thieu quang, hieu lang
thanh dung » thanh duong, thanh tung, thanh hung
luan nhung » luan hung, quan nhung, luan phuong
luan chung » luan chinh
cong vang » cong lang, cong quang, cong ngang
vang tan » van tan, tang tan, vang tao
tan cao » toan cao, tao cao, tay cao

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) OR (thieu khang)) - thanh dung ((luan nhung) or (luan chung)) cong vang tan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - thanh dung ((luan nhung) OR (luan chung)) cong vang tan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu khang)) - thanh dung ((luan nhung) or (luan chung)) cong vang tan cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) OR (thieu khang)) - thanh dung ((luan nhung) or (luan chung)) cong vang tan cao*.