Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
cuu thong » cuu thuong, cuu tong, cuu chong
thong hoc » thuong hoc, tuong hoc, thong hoa
hoc nganh » hoc nhanh
sach hoc » cach hoc, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
khoa hoc » hoa hoc
dap nhan » dap nha, dac nhan, dam nhan
nhan dan » phan dau, gian dan, nhan tai
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: so ((sach hoc) OR (sach hoi)) tap, nghien cuu thong hoc nganh khoa hoc xa hoi dap nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so ((sach hoc) OR (sach hoi)) tap, nghien cuu thong hoc nganh khoa hoc xa hoi dap nhan dan".
• Adding a wildcard symbol may retrieve word variants: so ((sach hoc) OR (sach hoi)) tap, nghien cuu thong hoc nganh khoa hoc xa hoi dap nhan dan*.