Perhaps you should try some spelling variations:
sach ky » sac ky, sach y, sach ty
dau cuu » dau cua, dau cuoi
te sach » toc sach
va kham » va cham, va tham, vu kham
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
va dan » va dao, va dau, va dap
ca dan » cac dan, ca dao
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. hieu ((va kham) or (va khao)) trung ((va dan) OR (ca dan)) dau cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang ma hoi. hieu ((va kham) OR (va khao)) trung ((va dan) OR (ca dan)) dau cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang ma hoi. hieu ((va kham) or (va khao)) trung ((va dan) OR (ca dan)) dau cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang ma hoi. hieu ((va kham) or (va khao)) trung ((va dan) OR (ca dan)) dau cuu tre*.