Perhaps you should try some spelling variations:
nhanh hung » thanh hung, nhanh hong, nhanh chuong
goc nhanh » hoc nhanh, doc nhanh, goc nhan
sach hoi » sach doi, sach moi, cach thoi
nhan van » nhan dan, nhan va, phan van
te sach » toc sach
hoi tap » hoi dap, hoc tap, hoi tai
va nhan » van nhan, ca nhan, va phan
mo goc » mot goc, mo hoc, mo uoc

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: "te sach hoi tap, nghien cuu mo goc nhanh hung ((hoc xa) OR (hoc ma)) hoi va nhan van~".
• Adding a wildcard symbol may retrieve word variants: te sach hoi tap, nghien cuu mo goc nhanh hung ((hoc xa) OR (hoc ma)) hoi va nhan van*.