Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
nghien chu » nghien cuu, nghiep cau, nghiep che
khung hoc » chung hoc, nhung hoc, thuong hoc
hoc nganh » hoc nhanh
nhan dan » gian dan, nhan tai
mai khoi » mai khoa, tai khoa, cac khoi
phan dau » phan tu, hang dau
sach hoc » cach hoc, sach hoi, mach hoc
tuan hoc » toan hoc, luan hoc, than hoc
chu tuan » chu xuan, thu tuan, chu quang
hoc mai » hoc ma, hoc dai, hoc bai
khoi va » hoi va, khi va, choi va
tu sach » thu sach, su sach, te sach

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 chu tuan hoc nganh khung hoc mai khoi va ((nhan dan) OR (phan dau))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach hoc tap, nghien chu tuan hoc nganh khung hoc mai khoi va ((nhan dan) OR (phan dau))".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien chu tuan hoc nganh khung hoc mai khoi va ((nhan dan) OR (phan dau))*.