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