Perhaps you should try some spelling variations:
trung hoc » trung quoc
danh tac » danh bac, doanh tai, danh thuc
vung hoc » dung hoc, vung moc, quang hoc
tac nang » tai nang, tap nang, tich nang
luc viet » luoc viet, tuc viet, duc viet
canh tac » canh tay, canh giac, cong tac
tac vang » cac van, tac dung, tac dong
vang hoc » van hoc, nang hoc, bang hoc
hien nam » phien nam, hien nay, vien nam

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((( danh tac ((vung hoc) OR (trung hoc)) viet nam ) or ((( danh tac nang luc viet nam ) or ( canh tac nang luc viet nam ))))) or ( danh tac vang hoc hien nam ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((( danh tac ((vung hoc) OR (trung hoc)) viet nam ) OR ((( danh tac nang luc viet nam ) OR ( canh tac nang luc viet nam ))))) OR ( danh tac vang hoc hien nam )).
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( danh tac ((vung hoc) OR (trung hoc)) viet nam ) or ((( danh tac nang luc viet nam ) or ( canh tac nang luc viet nam ))))) or ( danh tac vang hoc hien nam ))".
• Adding a wildcard symbol may retrieve word variants: (((( danh tac ((vung hoc) OR (trung hoc)) viet nam ) or ((( danh tac nang luc viet nam ) or ( canh tac nang luc viet nam ))))) or ( danh tac vang hoc hien nam ))*.