Perhaps you should try some spelling variations:
canh trang » canh tranh, hanh trang, banh trang
theo rau » theo dau, theo mau, theo chu
rau sach » cau sach, hau sach, khau sach
trang va » tran van, hang va
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh
tran cao » tran chau, trang cho, tranh cac
toan cao » toan ban, toan tap
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 rau sach - canh trang va nang ((cong dan) OR (cong tan)) ((tran cao) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo rau sach - canh trang va nang ((cong dan) OR (cong tan)) ((tran cao) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo rau sach - canh trang va nang ((cong dan) OR (cong tan)) ((tran cao) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: theo rau sach - canh trang va nang ((cong dan) OR (cong tan)) ((tran cao) or (toan cao))*.