Perhaps you should try some spelling variations:
thieu quang » hieu quang, thien quan, trien quang
thieu sang » chieu sang, thieu khang, hieu lang
canh manh » lanh manh, canh tranh, cach mang
hang cong » hang nong, bang cong, thanh cong
dang cong » dung cong
ban thanh » ban hanh, ban hang
thanh ban » thanh san, thanh van, thanh bac
manh cua » doanh cua, ban cua

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)) - canh manh cua ((hang cong) OR (dang cong)) ban thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (thieu quang)) - canh manh cua ((hang cong) OR (dang cong)) ban thanh ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu sang) or (thieu quang)) - canh manh cua ((hang cong) OR (dang cong)) ban thanh ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (thieu quang)) - canh manh cua ((hang cong) OR (dang cong)) ban thanh ban*.