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 cam » viec lam, viec cua, viec va
sach ky » sac ky, sach ty, sach kem
cam tuc » cam xuc, cam tu, nam thuc
cua tre » cua te, cuu tre, cua triet
lang ha » long ha
lang xa » dang xay, lang van
tuc va » thuc va, truc va, tuc xa
vi cua » vai cua, di 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) or (sach y)) ((lang xa) OR (lang ha)) hoi. nhieu viec cam tuc va trinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach ky) OR (sach y)) ((lang xa) OR (lang ha)) hoi. nhieu viec cam tuc va trinh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sach ky) or (sach y)) ((lang xa) OR (lang ha)) hoi. nhieu viec cam tuc va trinh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sach ky) or (sach y)) ((lang xa) OR (lang ha)) hoi. nhieu viec cam tuc va trinh vi cua tre*.