Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
tinh hoi » trinh hoi, tinh hoc, tinh hai
viec cam » viec lam, viec cua, viec va
tu sach » thu sach, su sach, te sach
hoi cua » hoi chuc
va tinh » may tinh
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
so sach » so sanh, bo sach, co sach
cua tre » cua te, cuu tre, cua triet
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) or (so sach)) ((ky lang) OR (ky tang)) xa hoi. nhieu viec cam xuc va tinh hoi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (so sach)) ((ky lang) OR (ky tang)) xa hoi. nhieu viec cam xuc va tinh hoi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) or (so sach)) ((ky lang) OR (ky tang)) xa hoi. nhieu viec cam xuc va tinh hoi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (so sach)) ((ky lang) OR (ky tang)) xa hoi. nhieu viec cam xuc va tinh hoi cua tre*.