Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach hoi » sach doi, sach moi, cach thoi
khoa hoc » hoa hoc
nhan dan » gian dan, nhan tai
phan dau » phan tu, hang dau
so sach » so sanh, bo sach, co sach
hoi tap » hoi dap, hoc tap, hoi tai
mo hoc » mon hoc, co hoc
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: so sach hoi tap, nghien cuu mo hoc nganh khoa hoc xa hoi ca ((nhan dan) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach hoi tap, nghien cuu mo hoc nganh khoa hoc xa hoi ca ((nhan dan) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: so sach hoi tap, nghien cuu mo hoc nganh khoa hoc xa hoi ca ((nhan dan) OR (phan dau))*.