Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
va thanh » gia thanh, ban thanh, va tinh
thanh ve » hanh ve, thanh va, thanh vien
su sach » so sach, vu sach
ky dinh » ky danh, ky kinh, my dinh
van cam » van nam, van lam, van cau
cua tre » cuu tre, cua triet, dua tren
xuc va » duc va, tuc va, luc va
cua te » cua tu

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

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ky dinh) OR (ky sinh)) xa hoi. hieu van cam xuc va thanh ve ((cua tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ky dinh) OR (ky sinh)) xa hoi. hieu van cam xuc va thanh ve ((cua tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky dinh) OR (ky sinh)) xa hoi. hieu van cam xuc va thanh ve ((cua tre) or (cua te))*.