Perhaps you should try some spelling variations:
tran khoa » toan khoa, san khoa, nhan khoa
thanh van » thanh san, thanh toan, thanh phan
sach hoi » sach moi, cach thoi, hoach hoi
sach doi » sach moi, sach dao, sach bai
hoc tran » hoc tan, hoc tren, boc tran
khoa hoc » hoa hoc
va thanh » gia thanh, ban thanh, va tinh
cuu mon » cuu mo, cuu mot, cuu cong
mon hoc » toan hoc, dong hoc
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 hoi) or (sach doi)) tap, nghien cuu mon hoc tran khoa hoc xa hoi va thanh van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach hoi) OR (sach doi)) tap, nghien cuu mon hoc tran khoa hoc xa hoi va thanh van.
• Adding a wildcard symbol may retrieve word variants: tu ((sach hoi) or (sach doi)) tap, nghien cuu mon hoc tran khoa hoc xa hoi va thanh van*.