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 truc » cau truc, cac tru, cac trung
viec cac » vien cac, viec cua, viec lam
truc va » thuc va, thuc vat, trung va
cua tre » cua te, cuu tre, cua triet
nang ma » tang ma, sang ma, nang cao
lang xa » lang ha, dang xay, lang van
mang xa » mang may, dang xay, mang cua
vi cua » vai cua, di cua
tu van » tu va

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu van ky ((((mang xa) OR (lang xa))) or (nang ma)) hoi. nhieu viec cac truc va trinh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu van ky ((((mang xa) OR (lang xa))) OR (nang ma)) hoi. nhieu viec cac truc va trinh vi cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu van ky ((((mang xa) OR (lang xa))) or (nang ma)) hoi. nhieu viec cac truc va trinh vi cua tre*".