Perhaps you should try some spelling variations:
hoc nganh » hoc nhanh
nganh hoa » thanh hoa, khanh hoa, danh hoa
sach hoc » cach hoc, sach hoi, mach hoc
tu sach » thu sach, su sach, te sach
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
va gian » va gianh, van gian, va gia
ma hoi » mai hoi, xa hoi, ma hoa

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 hoc tap, nghien cuu mon hoc nganh hoa hoc ma hoi ((va gian) OR (va giai)) dan~".
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu mon hoc nganh hoa hoc ma hoi ((va gian) OR (va giai)) dan*.