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
sach ky » sac ky, sach y, sach ty
tu sach » thu sach, su sach, te sach
tang xa » trang xa, tang ma, lang xa
ky tang » ky nang, ky dang, kho tang
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, luc va, xac va
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: tu sach ky tang xa hoi. ((nhieu viec) or (hieu viec)) cam ((xuc va) OR (tuc va)) tinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky tang xa hoi. ((nhieu viec) OR (hieu viec)) cam ((xuc va) OR (tuc va)) tinh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky tang xa hoi. ((nhieu viec) or (hieu viec)) cam ((xuc va) OR (tuc va)) tinh di cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky tang xa hoi. ((nhieu viec) or (hieu viec)) cam ((xuc va) OR (tuc va)) tinh di cua tre*.