Perhaps you should try some spelling variations:
nganh khong » nganh cong, nhanh chong, nganh nong
nghien thu » nghiem thuc, nghiep thuc, nghe thu
hoc nganh » hoc nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
dan chan » dan gian, dan ca, van chat
chan dan » chan doan, chan dang, nhan dan
su sach » so sach, vu sach
hoi tap » hoi dap, hoc tap, hoi tai
hoi dan » hoa dan, hoc dan, hoi dap
hoc xa » hoc ma

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su sach hoi tap, ((nghien thu) or (nghien cuu)) cong hoc nganh khong hoc xa hoi dan chan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach hoi tap, ((nghien thu) OR (nghien cuu)) cong hoc nganh khong hoc xa hoi dan chan dan.
• Adding a wildcard symbol may retrieve word variants: su sach hoi tap, ((nghien thu) or (nghien cuu)) cong hoc nganh khong hoc xa hoi dan chan dan*.