Perhaps you should try some spelling variations:
doanh van » doan van, doanh va, doanh ban
cac nuoc » cap nuoc, hoc nuoc, dat nuoc
toc sach » hoc sach, doc sach, thuoc sach
danh va » doanh va, hanh va, anh va
nuoc xa » nuoc va, nuoc ta, nuoc xo
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
ve cac » va cac, vien cac

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