Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
cua thuc » cua thuoc, chua thuc, cua tuc
trinh vi » trinh va, trinh ve, trinh viet
va trinh » van trinh, va tinh, lap trinh
cua tre » cua te, cua triet, dua tren
thuc va » thuc vat, thuc dan, thuc day
cuu tre » cau tren, cau treo
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
dan ky » van ky
tu dan » tuc dan, tu ban, cu dan

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

• If you are trying to use Boolean operators, they must be ALL CAPS: tu dan ky ((nang xa) OR (nang ma)) hoi. nhieu viec cua thuc va trinh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu dan ky ((nang xa) or (nang ma)) hoi. nhieu viec cua thuc va trinh vi ((cua tre) OR (cuu tre))~".
• Adding a wildcard symbol may retrieve word variants: tu dan ky ((nang xa) or (nang ma)) hoi. nhieu viec cua thuc va trinh vi ((cua tre) OR (cuu tre))*.