Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
hanh trinh » canh tranh, hanh chinh
phung cong » nhung cong, phong cong, nhung chong
tuan chau » chuan chau, thanh chau, tuan thu
tran chau » tranh chap, tran huu
trinh va » trinh van, trinh vat, trinh ve
va phung » va phuong, van phung, va nhung
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: doc ((chieu sach) OR (chiet tach)) - hanh trinh va phung cong van ((tuan chau) or (tran chau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (chiet tach)) - hanh trinh va phung cong van ((tuan chau) OR (tran chau)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((chieu sach) OR (chiet tach)) - hanh trinh va phung cong van ((tuan chau) or (tran chau))".
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sach) OR (chiet tach)) - hanh trinh va phung cong van ((tuan chau) or (tran chau))*.