Perhaps you should try some spelling variations:
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoi » sach doi, sach moi, cach thoi
cuu dong » cuu cong, cuu tong, cuu long
co nganh » hoc nganh, cac nganh, moi nganh
nhan dan » phan dau, gian dan, nhan tai
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 hoi dap, nghien cuu dong co nganh hoa hoc xa ((hop danh) or (hoc dan)) nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi dap, nghien cuu dong co nganh hoa hoc xa ((hop danh) OR (hoc dan)) nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi dap, nghien cuu dong co nganh hoa hoc xa ((hop danh) or (hoc dan)) nhan dan*.