Perhaps you should try some spelling variations:
phung tri » phung thi, nhung tri, phong tri
nhung loi » nhung bai, nhung bi, nhung gi
quen vang » quan van, que van, que lang
tong hopc » dong hoc, tuong hoc, cong hop
tri luan » tri quan, thi luan, tri tuan
hai tong » hai trong, thai tong, han tong
loi quen » loi que, thoi quen, moi quan
boi tong » noi tong, bi tong, boi thuong
hopc dan » hoc dan, hoa dan, hop danh
hop so » ho so, hon so, hoc so

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

• Performing a fuzzy search may retrieve terms with similar spellings: (( phung tri luan van. hai tong hop so ) or ( nhung loi quen vang. boi tong hopc dan ))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (( phung tri luan van. hai tong hop so ) OR ( nhung loi quen vang. boi tong hopc dan )).
• Adding a wildcard symbol may retrieve word variants: (( phung tri luan van. hai tong hop so ) or ( nhung loi quen vang. boi tong hopc dan ))*.