Perhaps you should try some spelling variations:
hieu viec » nhieu viec, hieu ve, sieu viet
viec bach » vien bach, viec ban, viec bao
thanh va » thanh van, hanh va, thanh ha
tu sach » thu sach, su sach, te sach
ky dang » ky danh
cuu tre » cua tre, cau tren, cau treo
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
va cuu » va cau, va chu, va huu

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) or (ky nang)) xa hoi. hieu viec bach ((xuc va) OR (luc va)) thanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((ky dang) OR (ky nang)) xa hoi. hieu viec bach ((xuc va) OR (luc va)) thanh va cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((ky dang) or (ky nang)) xa hoi. hieu viec bach ((xuc va) OR (luc va)) thanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((ky dang) or (ky nang)) xa hoi. hieu viec bach ((xuc va) OR (luc va)) thanh va cuu tre*.