Perhaps you should try some spelling variations:
nhanh khong » nhanh chong, nganh khong, nhan khong
nghien cua » nghien cuu, nghiep cua, nghiep vua
sach hoc » cach hoc, sach hoi, mach hoc
phan dan » phan dang, phan dau, nhan dan
tu sach » thu sach, su sach, te sach
mot hoc » mon hoc, mo hoc, mot goc
va phan » van phan, va phat, va phap
ma hoi » mai hoi, xa hoi, ma hoa

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 cua mot hoc ((nhanh khong) or (thanh cong)) hoc ma hoi va phan dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach hoc tap, nghien cua mot hoc ((nhanh khong) OR (thanh cong)) hoc ma hoi va phan dan.
• Adding a wildcard symbol may retrieve word variants: tu sach hoc tap, nghien cua mot hoc ((nhanh khong) or (thanh cong)) hoc ma hoi va phan dan*.