Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec cam » viec lam, viec cua, viec va
so sach » so sanh, bo sach, co sach
tinh da » tinh va, tinh gia, tinh lao
tinh di » tinh doi, trinh di, tin di
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
y nang » ky nang, ly nang, v nang
tuc va » thuc va, truc va, tuc xa
xuc va » duc va, luc va, xac va

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

• Performing a fuzzy search may retrieve terms with similar spellings: so sach y nang xa hoi. nhieu viec cam ((xuc va) or (tuc va)) ((tinh di) OR (tinh da)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so sach y nang xa hoi. nhieu viec cam ((xuc va) OR (tuc va)) ((tinh di) OR (tinh da)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so sach y nang xa hoi. nhieu viec cam ((xuc va) or (tuc va)) ((tinh di) OR (tinh da)) cua tre".
• Adding a wildcard symbol may retrieve word variants: so sach y nang xa hoi. nhieu viec cam ((xuc va) or (tuc va)) ((tinh di) OR (tinh da)) cua tre*.