Perhaps you should try some spelling variations:
nganh khong » nhanh chong, nganh nong, nganh khoa
nganh cong » nhanh chong, thanh cong
sach hoc » cach hoc, sach hoi, mach hoc
tu sach » thu sach, su sach, te sach
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao
mo hoc » mon hoc, co hoc
hoc xa » hoc ma

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cuu mo hoc ((nganh khong) OR (nganh cong)) hoc xa hoi va nhan va~".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mo hoc ((nganh khong) OR (nganh cong)) hoc xa hoi va nhan va*.