Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
trinh dai » trinh tai, trinh di, trinh da
va trinh » van trinh, va tinh, lap trinh
tu sach » thu sach, su sach, te sach
ky dang » ky danh
viec va » vien va, viec cua, viec lam
cua tre » cua te, cuu tre, cua triet
va xuc » va xac, va xu
xuc va » duc va, tuc va, luc va

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 ((ky dang) or (ky nang)) xa hoi. nhieu viec va xuc va trinh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky nang)) xa hoi. nhieu viec va xuc va trinh dai cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) or (ky nang)) xa hoi. nhieu viec va xuc va trinh dai cua tre*.