Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, sach hoi, mach hoc
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
cuu mot » cua mot, huu mot, cuu vuot
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 mo) or (cuu mot)) hoc nganh khong hoc xa hoi ca nhan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien ((cuu mo) OR (cuu mot)) hoc nganh khong hoc xa hoi ca nhan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien ((cuu mo) or (cuu mot)) hoc nganh khong hoc xa hoi ca nhan dan*.