Perhaps you should try some spelling variations:
thieu khang » chieu khong, thieu quang
nhung duong » nhung dung, nhung huong, nhung tuong
thieu sang » chieu sang, thieu quang, hieu lang
truong cua » truong quan, truong cao, huong cua
truong ca » truong cao, truong va, trong ca
duong anh » duong manh, duong xanh, duong vanh
tuan cua » quan cua, than cua, tan cua

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 ((truong cua) OR (truong ca)) nhung duong anh tuan cua~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu khang)) - thanh ((truong cua) OR (truong ca)) nhung duong anh tuan cua.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu khang)) - thanh ((truong cua) OR (truong ca)) nhung duong anh tuan cua".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu khang)) - thanh ((truong cua) OR (truong ca)) nhung duong anh tuan cua*.