Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
nghien chu » nghien cuu, nghiep cau, nghiep che
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
nhan dan » gian dan, nhan tai
sach hoi » sach doi, sach moi, cach thoi
phan dau » phan tu, hang dau
than hoc » toan hoc, thai hoc, than doc
chu than » chu thanh, chu han, chu chan
hoc dai » hoc dan
dai hoi » dai hoc, dai hai, dai moi
hoi tap » hoi dap, hoc tap, hoi tai
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 hoi tap, nghien chu than hoc nganh khung hoc dai hoi va ((nhan dan) or (phan dau))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, nghien chu than hoc nganh khung hoc dai hoi va ((nhan dan) OR (phan dau)).
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, nghien chu than hoc nganh khung hoc dai hoi va ((nhan dan) or (phan dau))*.