Perhaps you should try some spelling variations:
trinh vi » trinh va, trinh ve, trinh viet
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
va pham » van pham, va phat, va phap
tinh vi » tinh voi, tinh va, dinh vi
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
x hoi » xa hoi, o hoi, x ho

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: "tu sach y nang x hoi. hieu va pham duc va ((tinh vi) OR (trinh vi)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: tu sach y nang x hoi. hieu va pham duc va ((tinh vi) OR (trinh vi)) cuu tre*.