Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
hoc thieu » toc thieu, hoc hien
canh tang » anh tang, cang thang, hanh trang
cong tinh » cong trinh, cong vinh, cong thanh
long tinh » trong tinh, luong tin, dong tin
toan ban » van ban
va dung » van dung, va duong, vat dung

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 - ((canh tang) or (canh tranh)) va dung ((cong tinh) OR (long tinh)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - ((canh tang) OR (canh tranh)) va dung ((cong tinh) OR (long tinh)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu sang - ((canh tang) or (canh tranh)) va dung ((cong tinh) OR (long tinh)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - ((canh tang) or (canh tranh)) va dung ((cong tinh) OR (long tinh)) toan ban*.