Perhaps you should try some spelling variations:
doanh tong » doanh trong, doanh thuong, anh tong
hoa doanh » toan doanh, hoa dan
thu sach » tu sach, thuat sach, thuoc sach
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
tong hoc » tuong hoc, thong hoc, trong hoc
van phan » van phong, van thanh, luan phan
va nhan » van nhan, ca nhan, va phan
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: thu sach hoc tap, nghien cuu cong hoa doanh tong hoc xa hoi ((va nhan) or (van phan)) va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach hoc tap, nghien cuu cong hoa doanh tong hoc xa hoi ((va nhan) OR (van phan)) va.
• Adding a wildcard symbol may retrieve word variants: thu sach hoc tap, nghien cuu cong hoa doanh tong hoc xa hoi ((va nhan) or (van phan)) va*.