Perhaps you should try some spelling variations:
nhieu viec » nhien viet
hieu viec » hieu ve, sieu viet, hieu hien
tinh di » tinh doi, trinh di, tinh da
so sach » so sanh, bo sach, co sach
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
di cua » dai cua, doi cua, de cua

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