Perhaps you should try some spelling variations:
hoc nhanh » hoc nganh, hoc phan
danh hang » danh thang, tranh hang, danh thanh
sach hoc » cach hoc, sach hoi, mach hoc
cuu cong » cua cong, thu cong, cac cong
cong hoc » dong hoc, cong hoa, cong coc
hang tai » hang va, dung tai
so sach » so sanh, bo sach, co sach
ma hop » mau hop, ma hoa, va hop

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

• If you are trying to use Boolean operators, they must be ALL CAPS: so sach hoc tap, nghien cuu cong hoc nhanh ((khoa hoc) OR (hoa hoc)) ma hop danh hang tai~.
• Adding a wildcard symbol may retrieve word variants: so sach hoc tap, nghien cuu cong hoc nhanh ((khoa hoc) or (hoa hoc)) ma hop danh hang tai*.