Perhaps you should try some spelling variations:
khang cong » hang cong, thanh cong, dang cong
hien hanh » dieu hanh
hanh tran » hanh trang, thanh tran, hanh tram
van khang » van khanh, van thanh, van quang
cong van » cong vang, cong san, song van
van quan » van ban
quan ha » quan he

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 - ((hanh tran) or (canh tranh)) van khang cong van quan ha~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien hanh - ((hanh tran) OR (canh tranh)) van khang cong van quan ha.
• Adding a wildcard symbol may retrieve word variants: hoc hien hanh - ((hanh tran) or (canh tranh)) van khang cong van quan ha*.