Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
doanh van » doan van, doanh va, doanh ban
viec lam » viec va
tu sach » thu sach, su sach, te sach
ly nang » ky nang, ly hang, ly vang
van cuu » van cau, van chu, van cu
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, v nang, may nang
so van » su van, vo van

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 ((y nang) OR (ly nang)) xa hoi. hieu ((viec cua) or (viec lam)) so van doanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ly nang)) xa hoi. hieu ((viec cua) OR (viec lam)) so van doanh van cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((y nang) OR (ly nang)) xa hoi. hieu ((viec cua) or (viec lam)) so van doanh van cuu tre*".