Perhaps you should try some spelling variations:
doanh phan » doanh nhan, doan phan, doanh thanh
hoc nhanh » hoc phan
hoi doanh » hoa doanh, voi doanh, doi doanh
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
tu sach » thu sach, su sach, te sach
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 dong ((hoc nganh) OR (hoc nhanh)) hoa hoc xa hoi doanh phan tu~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu dong ((hoc nganh) OR (hoc nhanh)) hoa hoc xa hoi doanh phan tu".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu dong ((hoc nganh) OR (hoc nhanh)) hoa hoc xa hoi doanh phan tu*.