Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
thong cong » trong cong, tong cong, thong thong
hanh tran » hanh trang, thanh tran, thanh trang
hanh tram » hanh tam, hanh trang, thanh tran
van thong » van thuong, van phong, va thong
cong tan » cong tac, cong san, cong thanh
tan phan » toan phan, than phan, van phan
phan cac » nhan cach, phan dau, phan lap

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo ((chieu sach) OR (chiet tach)) - ((hanh tran) or (hanh tram)) van thong cong tan phan cac~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - ((hanh tran) OR (hanh tram)) van thong cong tan phan cac.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - ((hanh tran) or (hanh tram)) van thong cong tan phan cac".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - ((hanh tran) or (hanh tram)) van thong cong tan phan cac*.