Perhaps you should try some spelling variations:
hien nhanh » thien thanh, tien thanh, dien thanh
thanh tinh » thanh binh, nhanh tinh, than kinh
hien hanh » dieu hanh
bang cong » dang cong, bang song, hang cong
tinh cua » trinh cua, sinh cua, tinh chat
cua bang » chua bang, cua ban, cua dang
van tan » van tuan, van tai, van thanh

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 hanh) or (hien nhanh)) - thanh tinh cua bang cong ((van tan) or (van ban)) ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien hanh) OR (hien nhanh)) - thanh tinh cua bang cong ((van tan) OR (van ban)) ban.
• Adding a wildcard symbol may retrieve word variants: hoc ((hien hanh) or (hien nhanh)) - thanh tinh cua bang cong ((van tan) or (van ban)) ban*.