Perhaps you should try some spelling variations:
hoc doanh » hoa doanh, hoc danh, hoc dan
doanh hoa » doanh khoa, doanh hoan, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
von luan » tong luan
su sach » so sach, vu sach
cuu mot » cua mot, huu mot, cuu vuot
hoi von » hoi vo, hoi dong, choi voi
hoc xa » hoc ma

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: su sach hoc tap, nghien ((cuu mo) OR (cuu mot)) hoc doanh hoa hoc xa hoi von luan van~.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien ((cuu mo) or (cuu mot)) hoc doanh hoa hoc xa hoi von luan van*.