Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
luan chung » luan chinh
hoc thieu » toc thieu, hoc hien
tang luan » dung luan
cong manh » cong danh, duong manh, cong thanh
anh tang » anh bang, anh dang, anh nang
cong dan » cong san, cong tan, huong dan
toan cao » toan ban, toan tap

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 - anh tang luan chung ((cong manh) or (cong dan)) toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu sang - anh tang luan chung ((cong manh) OR (cong dan)) toan cao.
• Adding a wildcard symbol may retrieve word variants: hoc thieu sang - anh tang luan chung ((cong manh) or (cong dan)) toan cao*.