Perhaps you should try some spelling variations:
van doanh » toan doanh, van dong, van thanh
toc sach » hoc sach, doc sach, thuoc sach
va doanh » vay doanh, va danh, hoa doanh
hieu van » hieu va, thien van, lieu va
dan cua » dan ca, ban cua, dai cua
cua tre » cua te, cuu tre, cua triet
cac tac » cac toc, cac bac, cac dac
sach ky » sac ky, sach y, sach ty
cac tuc » cac toc, cac tu, cac nuoc
nang xa » nang x, lang xa, nang ma

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

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