Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
va trinh » van trinh, va tinh, lap trinh
trinh di » trinh do, trinh dien, trinh dinh
lang xa » dang xay, lang van
lang ha » long ha
cua luc » cua duc, cua tuc, cua cuc
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky
luc va » duc va, tuc va, loc va
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky ((lang xa) or (lang ha)) hoi. nhieu viec cua luc va trinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky ((lang xa) OR (lang ha)) hoi. nhieu viec cua luc va trinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky ((lang xa) or (lang ha)) hoi. nhieu viec cua luc va trinh di cua tre*.