Perhaps you should try some spelling variations:
hoc phien » hoc hien, thuoc phien, hoc nghien
phien nam » hien nay, phien ban, vien nam
danh tac » canh tac, doanh tai, danh thuc
hoa hien » hoc hien, hoa bien, hoan thien
hien nam » hien nay, vien nam, mien nam
danh bac » doanh bac, danh bat, dan bac
cong tac » cong ty
tac van » tac vang, cac van, tac can
bac van » bach van, cac van, ban van
tac va » tac da, tac xa, tuc va
va hoc » van hoc

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

• If you are trying to use Boolean operators, they must be ALL CAPS: (((( danh tac van hoa hien nam ) OR ( danh bac van hoa hien nam ))) OR ( cong tac va hoc phien nam ))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "(((( danh tac van hoa hien nam ) OR ( danh bac van hoa hien nam ))) or ( cong tac va hoc phien nam ))~".
• Adding a wildcard symbol may retrieve word variants: (((( danh tac van hoa hien nam ) OR ( danh bac van hoa hien nam ))) or ( cong tac va hoc phien nam ))*.