Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
dang xay » dang van, van xay
trinh ke » trinh ky, trinh he, trinh do
va trinh » van trinh, va tinh, lap trinh
viec cam » viec lam, viec cua, viec va
cua tre » cua te, cuu tre, cua triet
lang xa » lang ha, lang van
sac ky » cac ky, sai ky
cam tu » cam thu, nam tu, dam tu
ke cua » keo cua, le cua, ky 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 ((sac ky) or (sach y)) ((lang xa) OR (dang xay)) hoi. nhieu viec cam tu va trinh ke cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach y)) ((lang xa) OR (dang xay)) hoi. nhieu viec cam tu va trinh ke cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((sac ky) or (sach y)) ((lang xa) OR (dang xay)) hoi. nhieu viec cam tu va trinh ke cua tre".
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach y)) ((lang xa) OR (dang xay)) hoi. nhieu viec cam tu va trinh ke cua tre*.