Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
thanh tung » thanh cong
hoc thieu » toc thieu, hoc hien
trong tan » trong quan, trong cac, trong ca
vat dung » van dung, viet dung, mat duong
toan cao » toan tap
toan ban » van ban
va dung » van dung, va duong, va ung

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 tung ((va dung) or (vat dung)) trong tan ((toan cao) OR (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - thanh tung ((va dung) OR (vat dung)) trong tan ((toan cao) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - thanh tung ((va dung) or (vat dung)) trong tan ((toan cao) OR (toan ban))*".