Perhaps you should try some spelling variations:
nhanh khong » nganh khong, nhan khong, nhanh hong
nhanh chong » thanh cong, khanh phong
nghien cua » nghien cuu, nghiep cua, nghiep vua
sach hoc » cach hoc, sach hoi, mach hoc
van phan » van phong, van thanh, luan phan
phan dan » phan dang, phan dau, nhan dan
tu sach » thu sach, su sach, te sach
hoi van » hoi va, hoi dan, hai van
hoc xa » hoc ma

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