Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
truong cao » truong dai
nhung cong » dung cong, thong cong, nhung don
hoc thieu » toc thieu, hoc hien
thong cua » thong quan, thong tu, huong cua
hang cong » dang cong, hang nong, bang cong
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 - manh ((truong cao) or (thong cua)) ((nhung cong) OR (hang cong)) manh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - manh ((truong cao) OR (thong cua)) ((nhung cong) OR (hang cong)) manh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - manh ((truong cao) or (thong cua)) ((nhung cong) OR (hang cong)) manh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - manh ((truong cao) or (thong cua)) ((nhung cong) OR (hang cong)) manh toan ban*.