Perhaps you should try some spelling variations:
nguyen huy » nguyen huu, nguyen duy, nguyen duc
nganh khoa » nganh hoa, nganh khong, doanh khoa
goc nganh » hoc nganh, hoc nhanh, cac nganh
nhan dann » nhan dang, phan dang, nhac dan
sach hoi » sach doi, sach moi, cach thoi
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
hoi tai » hoc tai, hoi trac
huy mot » huu mot, chua mot, huoc mot
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 tai, nguyen huy mot goc nganh khoa hoc xa hoi va ((nhan dann) or (nhan dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tai, nguyen huy mot goc nganh khoa hoc xa hoi va ((nhan dann) OR (nhan dan)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tai, nguyen huy mot goc nganh khoa hoc xa hoi va ((nhan dann) or (nhan dan))*.