Perhaps you should try some spelling variations:
nhieu viec » hieu viec, nhien viet
viec cam » viec lam, viec cua, viec va
tinh hoi » trinh hoi, tinh hoc, tinh hai
cau tren » cu tren, dau tren, ca tren
tu sach » thu sach, su sach, te sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
va tinh » may tinh
cua tre » cua te, cua triet, dua tren
cuu tre » 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 nang xa hoi. nhieu viec cam xuc va tinh hoi ((cua tre) or (((cuu tre) OR (cau tren))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ky nang xa hoi. nhieu viec cam xuc va tinh hoi ((cua tre) OR (((cuu tre) OR (cau tren)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ky nang xa hoi. nhieu viec cam xuc va tinh hoi ((cua tre) or (((cuu tre) OR (cau tren))))".
• Adding a wildcard symbol may retrieve word variants: tu sach ky nang xa hoi. nhieu viec cam xuc va tinh hoi ((cua tre) or (((cuu tre) OR (cau tren))))*.