Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien cac » nghiep cach, nghien cuu, nghiep cay
nganh khoa » nganh hoa, doanh khoa, anh khoa
phan dau » phan tu, hang dau
cac cong » cua cong
cong hoc » dong hoc, cong hoa, cong coc
sach hoc » cach hoc, sach hoi, mach hoc
cuu phan » cuu phat, cuu nhan, uu phan
hoc cuu » hoc huu, hoc cua, hoc cau
tu sach » thu sach, su sach, te sach
xa hoc » xa hoi, va hoc, xa hoa
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: tu sach hoc tap, nghien cac cong hoc ((nganh khoa) OR (nganh khong)) hoc xa hoc cuu phan dau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien cac cong hoc ((nganh khoa) OR (nganh khong)) hoc xa hoc cuu phan dau".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cac cong hoc ((nganh khoa) OR (nganh khong)) hoc xa hoc cuu phan dau*.