Perhaps you should try some spelling variations:
hanh trang » thanh trung, canh tranh, minh trang
chieu sach » chinh sach, chiet tach, chieu sang
hanh trinh » canh tranh, hanh chinh
phung cong » nhung cong, phong cong, nhung chong
hieu lang » chieu sang, hieu quang, nhieu tang
tuan chau » tran chau, chuan chau, thanh chau
va phung » va phuong, van phung, va nhung
cong san » cong tac
san tuan » van tuan, san luan, san quan

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 sach) or (hieu lang)) - ((hanh trang) OR (hanh trinh)) va phung cong san tuan chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu sach) OR (hieu lang)) - ((hanh trang) OR (hanh trinh)) va phung cong san tuan chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu sach) or (hieu lang)) - ((hanh trang) OR (hanh trinh)) va phung cong san tuan chau".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu sach) or (hieu lang)) - ((hanh trang) OR (hanh trinh)) va phung cong san tuan chau*.