Perhaps you should try some spelling variations:
thoi quyen » thoi quen, thoi nguyen, thuoc quyen
nhung thoi » nhung thi, phung thi, nhung tri
nhung loi » nhung bai, nhung bi, nhung gi
quyen van » quyet van, huyen van, nguyen van
dai cuong » tai cong
cuong hoc » duong hoc, tuong hoc, truong hoc
loi quan » moi quan, noi quan, loi nhuan
quan van » luan van, quan va, quan luan
noi dung » hoc dung
dung hoc » dong hoc, dung thuoc, trung hoc
hoc bong » hoc cong, hoc trong, hoc luong
hoc mot » hoc moi

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: (( nhung loi quan van. noi dung hoc mot ) OR ( nhung thoi quyen van. dai cuong hoc bong ))~.
• Adding a wildcard symbol may retrieve word variants: (( nhung loi quan van. noi dung hoc mot ) or ( nhung thoi quyen van. dai cuong hoc bong ))*.