Perhaps you should try some spelling variations:
nghien gia » nghiep giao, nguyen gia
hoc doanh » hoa doanh, hoc dan, hoc nganh
sach hoc » cach hoc, sach hoi, mach hoc
hoc danh » hoc dan, hoc anh, hoc hanh
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
su sach » so sach, vu sach
hoc xa » hoc ma
hoi ca » hoi cua, hoi cac, hoi cau

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoc tap, nghien gia thanh ((hoc doanh) or (hoc danh)) khoa hoc xa hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoc tap, nghien gia thanh ((hoc doanh) OR (hoc danh)) khoa hoc xa hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: su sach hoc tap, nghien gia thanh ((hoc doanh) or (hoc danh)) khoa hoc xa hoi ca nhan dan*.