Perhaps you should try some spelling variations:
nghien cua » nghien cuu, nghiep cua, nghiep vua
khoi nganh » hoc nganh, moi nganh
hoa nganh » hoc nganh, hoa doanh, hoa thanh
sach hoc » cach hoc, sach hoi, mach hoc
cua dong » chua dong, cua cong, cua dang
khoa hoc » hoa hoc
nhan dan » phan dau, gian dan, nhan tai
te sach » toc sach
va nhan » van nhan, ca nhan, va phan
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: te sach hoc tap, nghien cua dong ((hoa nganh) OR (khoi nganh)) khoa hoc xa hoi va nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach hoc tap, nghien cua dong ((hoa nganh) OR (khoi nganh)) khoa hoc xa hoi va nhan dan".
• Adding a wildcard symbol may retrieve word variants: te sach hoc tap, nghien cua dong ((hoa nganh) OR (khoi nganh)) khoa hoc xa hoi va nhan dan*.