Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
dung cong » dung trong
cong danh » cuong danh, cong dan, cong thanh
danh toan » manh toan, anh toan, dan toan
cung vap » cung va, cung van, dung va
cung cap » trung cap
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 - manh ((cung vap) or (cung cap)) dung cong danh toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - manh ((cung vap) OR (cung cap)) dung cong danh toan tap.
• Adding a wildcard symbol may retrieve word variants: toc thieu sang - manh ((cung vap) or (cung cap)) dung cong danh toan tap*.