Perhaps you should try some spelling variations:
hanh tranh » canh tranh, hanh trinh, hanh trang
ban thanh » ban hanh, ban hang
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban
hoc ban » hoc bang, hoc dan, hoc bai
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: hoc ban thanh - hanh tranh ((va hang) or (va nang)) cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ban thanh - hanh tranh ((va hang) OR (va nang)) cong van toan ban.
• Adding a wildcard symbol may retrieve word variants: hoc ban thanh - hanh tranh ((va hang) or (va nang)) cong van toan ban*.