Perhaps you should try some spelling variations:
cuu dong » cuu cong, cuu tong, cuu long
danh hoa » thanh hoa, khanh hoa, nganh hoa
cua ngan » cua ban, vu ngan, cua dan
ngan dan » ngan danh, nhan dan, ngan han
te sach » toc sach
so sach » so sanh, bo sach, co sach
co danh » cao danh, co dan, do danh
hoi cua » hoi chuc
hoc xa » hoc ma

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (so sach)) hoc tap, nghien cuu dong co danh hoa hoc xa hoi cua ngan dan~.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (so sach)) hoc tap, nghien cuu dong co danh hoa hoc xa hoi cua ngan dan*.