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

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

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