Perhaps you should try some spelling variations:
nhanh thang » nhanh thanh, nhanh quang, hanh trang
hoc nhanh » hoc nganh, hoc phan
thang hoc » thang nhoc, than hoc, thanh hoc
sach doi » sach hoi, sach moi, sach dao
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
hoa va » hoa van, hoa xa, hoa vi
hoa vo » hoa co

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 thang hoc ma ((hoa va) OR (hoa vo)) nhan tai~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach doi tap, nghien cuu mon hoc nhanh thang hoc ma ((hoa va) OR (hoa vo)) nhan tai*".