Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
luan chung » luan chinh
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 tap » toan ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((thieu sang) OR (thieu quang)) - anh tang luan chung ((cong manh) or (cong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu sang) OR (thieu quang)) - anh tang luan chung ((cong manh) OR (cong dan)) toan tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu sang) OR (thieu quang)) - anh tang luan chung ((cong manh) or (cong dan)) toan tap".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu sang) OR (thieu quang)) - anh tang luan chung ((cong manh) or (cong dan)) toan tap*.