Perhaps you should try some spelling variations:
ta doanh » va doanh, ty doanh, toan doanh
toc sach » hoc sach, doc sach, thuoc sach
te doanh » te danh, de doanh, ty doanh
van cuu » van cau, van chu, van cu
cac toc » cac toi, cac nuoc, cac thoi
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
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 toc ((ta doanh) or (te doanh)) van cuu 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 toc ((ta doanh) OR (te doanh)) van cuu 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 toc ((ta doanh) or (te doanh)) van cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky nang xa hoi. hieu ve cac toc ((ta doanh) or (te doanh)) van cuu tre*.