Perhaps you should try some spelling variations:
quang nhung » quang hung, quan nhung, quang phuong
chieu sang » chieu sach, chieu xanh, hieu lang
hoi chieu » doi chieu, ho chieu, hai chieu
hanh tran » hanh trang, thanh tran, hanh tram
cong van » cong vang, song van, cong tan
cong san » cong tac
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: hoi chieu sang - hanh tran quang nhung ((cong van) or (cong san)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoi chieu sang - hanh tran quang nhung ((cong van) OR (cong san)) toan tap.
• Adding a wildcard symbol may retrieve word variants: hoi chieu sang - hanh tran quang nhung ((cong van) or (cong san)) toan tap*.