Perhaps you should try some spelling variations:
pham chieu » phan hieu, pham hiep, phap hieu
chieu sang » chieu sach, chieu xanh, hieu lang
hanh tranh » canh tranh, hanh trinh, hanh trang
chua dong » cua dong, ha dong, huy dong
cua dang » cua cong, cua ban
cong van » cong vang, cong san, song van

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

• Performing a fuzzy search may retrieve terms with similar spellings: pham chieu sang - hanh tranh ((cua dang) or (chua dong)) trong cong van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: pham chieu sang - hanh tranh ((cua dang) OR (chua dong)) trong cong van ban.
• Adding a wildcard symbol may retrieve word variants: pham chieu sang - hanh tranh ((cua dang) or (chua dong)) trong cong van ban*.