Perhaps you should try some spelling variations:
chieu sach » chinh sach, chiet tach, chieu xanh
chieu sang » chieu xanh, hieu lang, nhieu tang
hanh trinh » hanh chinh
nhung cong » dung cong, thong cong, hang cong
cua nhung » va nhung
cong san » cong tac
san chay » san pham, van chat, dan chan
chay nan » chan nan, chai nang, chae ran

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho ((chieu sach) or (chieu sang)) - ((hanh trinh) OR (canh tranh)) cua nhung cong san chay nan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho ((chieu sach) OR (chieu sang)) - ((hanh trinh) OR (canh tranh)) cua nhung cong san chay nan.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho ((chieu sach) or (chieu sang)) - ((hanh trinh) OR (canh tranh)) cua nhung cong san chay nan".
• Adding a wildcard symbol may retrieve word variants: ho ((chieu sach) or (chieu sang)) - ((hanh trinh) OR (canh tranh)) cua nhung cong san chay nan*.