Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thanh trung » thanh tung
thieu sang » chieu sang, thieu khang, hieu lang
trung tuan » trung thanh, trung tam, tran tuan
tuan dung » tuan duong, tran dung, tan dung
dung cong » dung trong
cong danh » cuong danh, cong dan, cong thanh
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) OR (thieu quang)) - thanh trung tuan dung cong danh ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - thanh trung tuan dung cong danh ((toan tap) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) OR (thieu quang)) - thanh trung tuan dung cong danh ((toan tap) or (toan ban))*".