Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec lam » viec va
dang cay » dang xay, dang ca, dung cay
dang cac » dung cac, bang cac, dong cac
lam luc » lao luc, lam duoc
cua tre » cua te, cua triet, dua tren
tinh di » tinh doi, trinh di, tinh da
va tinh » may tinh
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
cuu tre » cau tren, cau treo
luc va » duc va, tuc va, loc 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 sach ky ((dang cay) OR (dang cac)) phoi. nhieu viec lam luc va tinh di ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky ((dang cay) OR (dang cac)) phoi. nhieu viec lam luc va tinh di ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky ((dang cay) OR (dang cac)) phoi. nhieu viec lam luc va tinh di ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky ((dang cay) OR (dang cac)) phoi. nhieu viec lam luc va tinh di ((cua tre) or (cuu tre))*.