Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung quan » truong quan, trong quan, trung tuan
quan trong » gian trong
hien xanh » hien nhanh, chieu xanh, hien khanh
hien hanh » dieu hanh
cong van » cong vang, cong san, song van
van toan » van tuan, van tan, van thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((hien xanh) or (hien hanh)) - thanh trung quan trong cong van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien xanh) OR (hien hanh)) - thanh trung quan trong cong van toan ban*.