Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
khoi nganh » hoc nganh, moi nganh
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, sach hoi, mach hoc
so sach » so sanh, bo sach, co 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: so sach hoc tap, nghien ((cac cong) or (cua cong)) khoi nganh khong hoc xa hoi ca nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien ((cac cong) OR (cua cong)) khoi nganh khong hoc xa hoi ca nhan va.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien ((cac cong) or (cua cong)) khoi nganh khong hoc xa hoi ca nhan va*.