Perhaps you should try some spelling variations:
thieu sang » chieu sang, thieu khang, thieu quang
chieu xanh » chieu sach, chieu sang, chieu tinh
tinh tinh » trinh tinh, tinh ninh, tinh binh
bang cong » dang cong, bang song, hang cong
tinh vat » trinh vat, sinh vat, tinh va
vat bang » mat bang, va bang, van bang
cong san » cong tac
san toan » van toan, dan toan, manh toan
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 (chieu xanh)) - tinh tinh vat bang cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu sang) OR (chieu xanh)) - tinh tinh vat bang cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu sang) or (chieu xanh)) - tinh tinh vat bang cong san toan ban*.