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
cao suc » cao su, cao duc
cua tre » cuu tre, cua triet, dua tren
suc van » su van, duc van, luc van
sach ty » sach y, sach tu, sach thu
hieu va » lieu va
nang xa » nang x, lang xa, nang ma
ty nang » ky nang, ty xang, ty hang
cua te » cua tu

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 xa hoi. ((hieu va) or (hieu qua)) cao suc van doanh van ((cua tre) OR (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ty nang xa hoi. ((hieu va) OR (hieu qua)) cao suc van doanh van ((cua tre) OR (cua te)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ty nang xa hoi. ((hieu va) or (hieu qua)) cao suc van doanh van ((cua tre) OR (cua te))".
• Adding a wildcard symbol may retrieve word variants: te sach ty nang xa hoi. ((hieu va) or (hieu qua)) cao suc van doanh van ((cua tre) OR (cua te))*.