Perhaps you should try some spelling variations:
nganh khoa » nganh hoa, nganh khong, doanh khoa
hoc nganh » hoc nhanh
sach hoc » cach hoc, sach hoi, mach hoc
so sach » so sanh, bo sach, co sach
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
hoc lai » hoc bai, hoc lam, hoc tai
hoc dai » hoc dan
va nhan » van nhan, ca nhan, va phan
nhan va » nhan tai, nhan dan, nhan tao

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 cuu mot hoc nganh khoa ((hoc lai) or (hoc dai)) hoi va nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu mot hoc nganh khoa ((hoc lai) OR (hoc dai)) hoi va nhan va.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu mot hoc nganh khoa ((hoc lai) or (hoc dai)) hoi va nhan va*.