Perhaps you should try some spelling variations:
nhanh khong » nhanh chong, nganh khong, nhan khong
khong hoc » khung hoc, thong hoc, khong thuoc
sach hoc » cach hoc, sach hoi, mach hoc
toan hoc » toan khoa, van hoc, hoa hoc
dai khoi » dai hoi, dai khoa, mai khoi
tu sach » thu sach, su sach, te sach
mon hoc » dong hoc
hoc dai » hoc dan
khoi ca » khoi can, khoi cua, khoi va
nhan va » nhan tai, nhan dan, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach hoc tap, nghien cuu ((mon hoc) or (toan hoc)) nhanh khong hoc dai khoi ca nhan va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cuu ((mon hoc) OR (toan hoc)) nhanh khong hoc dai khoi ca nhan va.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cuu ((mon hoc) or (toan hoc)) nhanh khong hoc dai khoi ca nhan va*.