Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
coc nganh » hoc nganh, cac nganh, chuc nganh
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, mach hoc, sach duoc
sach hoi » sach doi, sach moi, cach thoi
cuu cong » cua cong, thu cong, cac cong
cong coc » cong cuoc, cong cac, cong co
nhan dan » phan dau, gian dan, nhan tai
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) OR (sach hoi)) tap, nghien cuu cong coc nganh khong hoc xa hoi ca nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach hoc) OR (sach hoi)) tap, nghien cuu cong coc nganh khong hoc xa hoi ca nhan dan".
• Adding a wildcard symbol may retrieve word variants: su ((sach hoc) OR (sach hoi)) tap, nghien cuu cong coc nganh khong hoc xa hoi ca nhan dan*.