Perhaps you should try some spelling variations:
nhanh khong » nhanh chong, nganh khong, nhan khong
nghien thu » nghiem thuc, nghiep thuc, nghien cuu
coc nhanh » hoc nhanh, doc nhanh, cach nhanh
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, sach hoi, mach hoc
cong coc » cong cuoc, cong cac, cong co
nhan dan » phan dau, gian dan, nhan tai
so sach » so sanh, bo sach, co sach
hoi cua » hoi chuc
hoc xa » hoc ma
hoi ca » hoi cac, hoi cau, hoi va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach hoc tap, nghien thu cong coc nhanh khong hoc xa ((hoi ca) OR (hoi cua)) nhan dan~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach hoc tap, nghien thu cong coc nhanh khong hoc xa ((hoi ca) OR (hoi cua)) nhan dan".
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien thu cong coc nhanh khong hoc xa ((hoi ca) OR (hoi cua)) nhan dan*.