Perhaps you should try some spelling variations:
thanh van » thanh toan, thanh phan, thanh nhan
hoc pvien » hoc vien, hoc hien, hoc lien
pvien nam » vien nam, phien nam, mien nam
canh tac » canh tay, canh giac, cong tac
hoc viet » hoc hien
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 viet nam ) or ( doanh ((thanh van) OR (thanh san)) hoc pvien nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( canh tac van hoc viet nam ) OR ( doanh ((thanh van) OR (thanh san)) hoc pvien nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(( canh tac van hoc viet nam ) or ( doanh ((thanh van) OR (thanh san)) hoc pvien nam ))".
• Adding a wildcard symbol may retrieve word variants: (( canh tac van hoc viet nam ) or ( doanh ((thanh van) OR (thanh san)) hoc pvien nam ))*.