Perhaps you should try some spelling variations:
thuoc sach » hoc sach, nuoc sach, thuat sach
doanh phan » doanh nhan, doan phan, doanh thanh
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
doi doanh » voi doanh, dong doanh, tri doanh
cuu tong » cuu cong, cuu tinh, huu tung
tong hoc » tuong hoc, thong hoc, trong hoc
tu sach » thu sach, su sach, te sach
hoc xa » hoc ma
xa doi » xoa doi, xa hoi, xa dai

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) or (thuoc sach)) hoc tap, nghien cuu tong hoc nganh hoa hoc xa doi doanh phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (thuoc sach)) hoc tap, nghien cuu tong hoc nganh hoa hoc xa doi doanh phan tu.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (thuoc sach)) hoc tap, nghien cuu tong hoc nganh hoa hoc xa doi doanh phan tu*.