Perhaps you should try some spelling variations:
doanh thong » doanh thuong, doanh tong, doanh trong
hoa doanh » toan doanh, hoa dan
thong hoc » thuong hoc, tuong hoc, thong hoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoa » dong hoa, dong hoc, hang hoa
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
nhan va » nhan tai, nhan tao, phan van
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 hoc tap, nghien cuu cong hoa doanh thong hoc xa hoi va ((nhan va) OR (nhan dan))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu cong hoa doanh thong hoc xa hoi va ((nhan va) OR (nhan dan))".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu cong hoa doanh thong hoc xa hoi va ((nhan va) OR (nhan dan))*.