Perhaps you should try some spelling variations:
nhanh chong » thanh cong, khanh phong
nhanh thong » nhanh thang, nhan thong, nhanh hong
sach doi » sach hoi, sach moi, sach dao
van nhan » van phan, van thanh, danh nhan
nhan tai » hang tai, van tai, toan tai
so sach » so sanh, bo sach, co sach
doi tap » doi tac, doi dap, doi tai
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
hoi van » hoi va, hoi dan, hai van
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: so sach doi tap, nghien cuu mon hoc ((nhanh thong) or (nhanh chong)) hoc ma hoi van nhan tai~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach doi tap, nghien cuu mon hoc ((nhanh thong) OR (nhanh chong)) hoc ma hoi van nhan tai*.