Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
tinh sinh » tinh ninh, tinh binh, tinh hinh
cong danh » cuong danh, cong thanh, cong khanh
cong dan » cong san, cong tan, huong dan
phan lap » phan dau
sinh va » sinh vat, tinh va, dinh van
va dung » van dung, va duong, vat dung

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 - tinh sinh va dung ((cong dan) or (cong danh)) phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc thieu sang - tinh sinh va dung ((cong dan) OR (cong danh)) phan lap*.