Perhaps you should try some spelling variations:
nganh khung » nganh khong, nhanh hung
nghien thu » nghiem thuc, nghiep thuc, nghe thu
hoc nganh » hoc nhanh
khung hoc » chung hoc, nhung hoc, thuong hoc
sach hoi » sach doi, sach moi, cach thoi
cong hoc » dong hoc, cong hoa, cong coc
dan nhan » danh nhan, dan chan, van nhan
tu sach » thu sach, su sach, te sach
hoi tap » hoi dap, hoc tap, hoi tai
hoi dan » hoa dan, hoc dan, hoi dap
nhan va » nhan tai, nhan dan, nhan tao
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: tu sach hoi tap, ((nghien thu) or (nghien cuu)) cong hoc nganh khung hoc xa hoi dan nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoi tap, ((nghien thu) OR (nghien cuu)) cong hoc nganh khung hoc xa hoi dan nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach hoi tap, ((nghien thu) or (nghien cuu)) cong hoc nganh khung hoc xa hoi dan nhan va*.