Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khong hoc » khung hoc, thong hoc, khong thuoc
mach hoc » cach hoc, dich hoc, anh hoc
toan hoc » toan khoa, van hoc, tin hoc
nhan dan » phan dau, gian dan, nhan tai
tu mach » tu cach, tu manh, tu hach
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: tu mach hoc tap, nghien cuu ((toan hoc) OR (hoa hoc)) nganh khong hoc xa hoi ca nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu mach hoc tap, nghien cuu ((toan hoc) OR (hoa hoc)) nganh khong hoc xa hoi ca nhan dan".
• Adding a wildcard symbol may retrieve word variants: tu mach hoc tap, nghien cuu ((toan hoc) OR (hoa hoc)) nganh khong hoc xa hoi ca nhan dan*.