Perhaps you should try some spelling variations:
hieu quy » hieu qua, hien quy, thien quy
quy pham » su pham, quy chau, my pham
vu sach » vu bach, su sach, vu khach
duc van » duc va, duc tan, duc manh
van anh » van thanh, tuan anh, van minh
cuu tre » cua tre, cau tren, cau treo
y nang » ly nang, v nang, may nang
anh va » hanh 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: vu sach ((y nang) OR (ky nang)) xa hoi. hieu quy pham duc van anh va ((cuu tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((y nang) OR (ky nang)) xa hoi. hieu quy pham duc van anh va ((cuu tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: vu sach ((y nang) OR (ky nang)) xa hoi. hieu quy pham duc van anh va ((cuu tre) or (cua te))*.