Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
lang van » dang van, tang van, hoang van
hoi cua » hoi chuc
doi cua » dai cua
va tinh » may tinh
viec va » vien va, viec cua, viec lam
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
lang xa » lang ha, dang xay
va duc » van duc, va duoc, va doc

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 ((lang xa) or (lang van)) hoi. nhieu viec va duc va tinh ((doi cua) OR (hoi cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((lang xa) OR (lang van)) hoi. nhieu viec va duc va tinh ((doi cua) OR (hoi cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((lang xa) or (lang van)) hoi. nhieu viec va duc va tinh ((doi cua) OR (hoi cua)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((lang xa) or (lang van)) hoi. nhieu viec va duc va tinh ((doi cua) OR (hoi cua)) tre*.