Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
cam nhan » ca nhan, cam chan, cam nang
nhan dan » phan dau, gian dan, nhan tai
tu sach » thu sach, su sach, te sach
hoi tap » hoc tap, hoi tai, hai tap
hoi cam » hoi cham, hoi cac, hoi cau
mo hoc » mon hoc, co hoc
hoc xa » hoc ma

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((hoi tap) OR (hoi dap)), nghien cuu mo hoc nganh hoa hoc xa hoi cam nhan dan~".
• Adding a wildcard symbol may retrieve word variants: tu sach ((hoi tap) OR (hoi dap)), nghien cuu mo hoc nganh hoa hoc xa hoi cam nhan dan*.