Perhaps you should try some spelling variations:
doanh trong » doanh tong, doanh thuong, dinh trong
hoan doanh » toan doanh, hoa doanh, doanh doanh
sach thoi » cach thoi, sach hoi, sach tham
cong hoan » cong hoa, dong hoa, cong san
trong hoc » truong hoc, tuong hoc, thong hoc
thoi tai » thoi dai, hoi tai, phoi tai
cuu cong » cua cong, thu cong, cac cong
toan tai » toan tap, doanh tai, toan ban
su sach » so sach, vu sach
hoi bai » hoi tai, khoi bay
hoc bai » hoc dai, hoc giai
hoc xa » hoc ma

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach thoi tai, nghien cuu cong hoan doanh trong hoc xa ((hoi bai) OR (hoc bai)) toan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach thoi tai, nghien cuu cong hoan doanh trong hoc xa ((hoi bai) OR (hoc bai)) toan tai".
• Adding a wildcard symbol may retrieve word variants: su sach thoi tai, nghien cuu cong hoan doanh trong hoc xa ((hoi bai) OR (hoc bai)) toan tai*.