Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
dang xay » dang van
viec cam » viec lam, viec cua, viec va
su sach » so sach, vu sach
sach ty » sach y, sach tu, sach thu
va tinh » may tinh
tinh da » tinh va, tinh gia, tinh lao
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va
da cua » dai cua, day cua, dan cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ty ((dang xay) or (van xay)) hoi. nhieu viec cam xuc va tinh da cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ty ((dang xay) OR (van xay)) hoi. nhieu viec cam xuc va tinh da cua tre.
• Adding a wildcard symbol may retrieve word variants: su sach ty ((dang xay) or (van xay)) hoi. nhieu viec cam xuc va tinh da cua tre*.