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
viec cac » vien cac, viec cua, viec lam
cac xuc » cam xuc, cac nuoc, chat xuc
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
sac ky » sai ky
xuc va » duc va, tuc va, luc va
vi cua » vai cua, di cua

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