Perhaps you should try some spelling variations:
hien hanh » dieu hanh
hang cong » dang cong, hang nong, bang cong
hien anh » thien anh, dien anh, tien anh
tranh va » tranh van, trang va, trinh va
san chan » san chang, dan chan, ban chan
san chay » san pham, van chat, dan chan
va hang » van hang, va nang, va lang

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 anh) or (hien hanh)) - canh tranh va hang cong ((san chan) OR (san chay)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((hien anh) OR (hien hanh)) - canh tranh va hang cong ((san chan) OR (san chay)) cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((hien anh) or (hien hanh)) - canh tranh va hang cong ((san chan) OR (san chay)) cau".
• Adding a wildcard symbol may retrieve word variants: hoc ((hien anh) or (hien hanh)) - canh tranh va hang cong ((san chan) OR (san chay)) cau*.