Perhaps you should try some spelling variations:
chieu sach » chinh sach, chieu sang, chieu xanh
cong thanh » dong thanh, cong trinh, cong tan
thanh tran » thanh trang, thanh toan, thanh tra
nhan dang » nhan dan, phan dang, tran dang
tran chau » tranh chap, tran huu
va hang » van hang, va lang, va hanh
va nang » van nang, da nang, cam nang

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)) - nhan dang ((va hang) or (va nang)) cong thanh tran chau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chieu sach) OR (chiet tach)) - nhan dang ((va hang) OR (va nang)) cong thanh tran chau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chieu sach) OR (chiet tach)) - nhan dang ((va hang) or (va nang)) cong thanh tran chau".
• Adding a wildcard symbol may retrieve word variants: theo ((chieu sach) OR (chiet tach)) - nhan dang ((va hang) or (va nang)) cong thanh tran chau*.