Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
sach hoc » cach hoc, sach hoi, mach hoc
cuu tuan » huu tuan, chu tuan, cuu toan
tuan hoc » toan hoc, luan hoc, than hoc
mai khoa » tai khoa, may khoa, dai khoa
nhan dan » phan dau, nhan tai
gian dan » gian lang
tu sach » thu sach, su sach, te sach
hoc mai » hoc ma, hoc dai, hoc bai
khoa va » khoan va, khoa ma, hoa va

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 tuan hoc nganh khung hoc mai khoa va ((nhan dan) or (gian dan))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu tuan hoc nganh khung hoc mai khoa va ((nhan dan) OR (gian dan)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu tuan hoc nganh khung hoc mai khoa va ((nhan dan) or (gian dan))*.