Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
doanh khoa » toan khoa
sach hoc » cach hoc, sach hoi, mach hoc
cuu dong » cuu cong, cuu tong, cuu long
dong hoc » dong co, dong luc
tu sach » thu sach, su sach, te sach
nhan va » nhan tai, nhan dan, nhan tao
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 sach hoc tap, nghien cuu dong hoc ((nganh khong) or (doanh khoa)) hoc xa hoi ca nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu dong hoc ((nganh khong) OR (doanh khoa)) hoc xa hoi ca nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu dong hoc ((nganh khong) or (doanh khoa)) hoc xa hoi ca nhan va*.