Perhaps you should try some spelling variations:
nhanh dong » hanh dong, nhanh chong, anh dong
hoc nhanh » hoc nganh, hoc phan
dong hoa » dong hoc, dong co
nhan tai » hang tai, van tai, toan tai
so sach » so sanh, bo sach, hoc sach
co sach » bo sach, cuon sach, hoc sach
doi tap » doi tac, doi dap, doi tai
cuu mot » cua mot, cuu mo, huu mot
mot hoc » mon hoc, mo hoc, mot goc
va nhan » van nhan, ca nhan, va phan
hoa ma » khoa ma, hoa may, hoa mau
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) OR (co sach)) doi tap, nghien cuu mot hoc nhanh dong hoa ma hoi va nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((so sach) OR (co sach)) doi tap, nghien cuu mot hoc nhanh dong hoa ma hoi va nhan tai*".