Perhaps you should try some spelling variations:
chieu sang » chieu xanh, nhieu tang
chieu sach » chinh sach, chiet tach, chieu xanh
hanh tranh » canh tranh, hanh trinh, hanh trang
hieu lang » hieu quang, nhieu tang, hieu van
bang cong » dang cong, bang song, hang cong
tranh va » tranh van, trang va, trinh va
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan ban » van ban
va bang » va nang, va lang, va ban

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((((chieu sang) or (chieu sach))) or (hieu lang)) - hanh tranh va bang cong san toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((((chieu sang) OR (chieu sach))) OR (hieu lang)) - hanh tranh va bang cong san toan ban.
• Adding a wildcard symbol may retrieve word variants: theo ((((chieu sang) or (chieu sach))) or (hieu lang)) - hanh tranh va bang cong san toan ban*.