Perhaps you should try some spelling variations:
sach trong » sac trong, sach rong, sanh trong
nghien huu » nghien cuu, nguyen huu, nhiem huu
hoan thanh » hoang thanh, ban thanh, van thanh
trong tan » trong quan, trong cac, trong ca
thanh hoa » thanh pho
mot hoan » moc hoang, mot doanh, hop hoan
phat van » pham van, phan van, phap van
so sach » so sanh, bo sach, co sach
huu mot » cuu mot, huy mot, hieu mot

You may be able to get more results by adjusting your search query.

• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach trong tan, nghien huu mot hoan thanh hoa ((hoc xa) OR (hoc ma)) hoi va phat van~".
• Adding a wildcard symbol may retrieve word variants: so sach trong tan, nghien huu mot hoan thanh hoa ((hoc xa) OR (hoc ma)) hoi va phat van*.