Perhaps you should try some spelling variations:
doanh thanh » danh thanh, doanh nhan, dinh thanh
thanh van » thanh san, thanh toan, thanh phan
hoc pvien » hoc hien, hoc viet, hoc lien
pvien nam » phien nam, viet nam, mien nam
canh tac » canh tay, canh giac, cong tac
hoc vien » hoc hien, hoc viet, hoc tieng
vien nam » viet nam, vien dai, van nam
tac van » tac vang, cac van, tac va
van hoc » van hoa

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( canh tac van hoc vien nam ) or ( doanh thanh van hoc pvien nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( canh tac van hoc vien nam ) OR ( doanh thanh van hoc pvien nam )).
• Adding a wildcard symbol may retrieve word variants: (( canh tac van hoc vien nam ) or ( doanh thanh van hoc pvien nam ))*.