Perhaps you should try some spelling variations:
doanh khong » doanh thuong, doanh khoa, doanh chung
hoa doanh » toan doanh, hoa dan
khong hoc » khung hoc, thong hoc, khong thuoc
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan tao » nhan tai, nhan dan
tu sach » thu sach, su sach, te sach
hoi tai » hoi trac
hoc tai » hoc dai, hoc tap, hoc bai
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: tu sach ((hoi tai) OR (hoc tai)), nghien cuu cong hoa doanh khong hoc xa hoi va nhan tao~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((hoi tai) OR (hoc tai)), nghien cuu cong hoa doanh khong hoc xa hoi va nhan tao".
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi tai) OR (hoc tai)), nghien cuu cong hoa doanh khong hoc xa hoi va nhan tao*.