Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
trinh dinh » trinh kinh, trinh sinh, trinh dung
tinh dinh » tinh ninh, tinh binh, tinh hinh
dang xay » dang van, van xay
viec cam » viec lam, viec cua, viec va
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
cuu tre » cua tre, cau tren, cau treo
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 xay hoi. nhieu viec cam xuc va ((tinh dinh) OR (trinh dinh)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky dang xay hoi. nhieu viec cam xuc va ((tinh dinh) OR (trinh dinh)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ky dang xay hoi. nhieu viec cam xuc va ((tinh dinh) OR (trinh dinh)) cuu tre*.