Perhaps you should try some spelling variations:
theo chiet » theo chieu, thep thiet
chiet tach » chieu sach
canh trinh » canh tranh, hanh trinh, canh tinh
trinh va » trinh van, trinh vat, trinh ve
cong dan » cong san, cong tan, cong dong
toan tap » toan ban
va bang » va nang, va lang, va ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chiet tach - canh trinh va bang ((cong dan) or (huong dan)) toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chiet tach - canh trinh va bang ((cong dan) OR (huong dan)) toan tap*.