Perhaps you should try some spelling variations:
cau treo » cau theo, cau tren, cau triet
danh vai » danh sai, danh va, doanh van
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, cua triet
te sach » toc sach
hieu ve » hieu va, hieu van
nang xa » nang x, lang xa, nang ma
toc ta » toc tay
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 ky nang xa hoi. hieu ve cac ((toc ta) OR (toc thai)) danh vai ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu ve cac ((toc ta) OR (toc thai)) danh vai ((cua tre) OR (cau treo))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu ve cac ((toc ta) OR (toc thai)) danh vai ((cua tre) or (cau treo))*".