Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
doanh van » doan van, doanh va, doanh ban
te sach » toc sach
ty nang » ty xang, ty hang, ly nang
hieu va » lieu va
cao suc » cao su, cao duc
suc van » su van, duc van, luc van
van cuu » van cau, van chu, van cu
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) or (hieu qua)) cao suc van doanh van cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) OR (hieu qua)) cao suc van doanh van cuu tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty nang) OR (ky nang)) xa hoi. ((hieu va) or (hieu qua)) cao suc van doanh van cuu tre*".