Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
trinh vi » trinh va, trinh ve, trinh viet
va trinh » van trinh, va tinh, lap trinh
cac thuc » cach thuc, cac thu, can thuc
viec cac » vien cac, viec cua, viec lam
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
nang xa » nang x, mang xa, ang xa
san ky » sang ky, van ky, dan ky
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can

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 san ky ((((nang xa) OR (lang xa))) OR (nang ma)) hoi. nhieu viec cac thuc va trinh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ky ((((nang xa) OR (lang xa))) or (nang ma)) hoi. nhieu viec cac thuc va trinh vi cua tre~".
• Adding a wildcard symbol may retrieve word variants: tu san ky ((((nang xa) OR (lang xa))) or (nang ma)) hoi. nhieu viec cac thuc va trinh vi cua tre*.