Perhaps you should try some spelling variations:
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
cong thanh » dong thanh, cong trinh, cong tan
thanh toan » thanh hoa, thanh san, tinh toan
doi chieu » doc hieu, doi chi, ho chieu
cua dang » cua cong
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: doi chieu sang - hanh tranh ((cua ban) or (cua dang)) cong thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu sang - hanh tranh ((cua ban) OR (cua dang)) cong thanh toan ban.
• Adding a wildcard symbol may retrieve word variants: doi chieu sang - hanh tranh ((cua ban) or (cua dang)) cong thanh toan ban*.