Perhaps you should try some spelling variations:
te sach » toc sach
sach ky » sac ky, sach y, sach ty
va hanh » van hanh, va thanh, va danh
van cau » van dau, van hau, van chat
cuu tre » cua tre, cau tren, cau treo
van cam » van nam, van lam, van dam
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
ma hoi » mai hoi, xa hoi, ma hoa
cua te » cua tu

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 dang ma hoi. hieu ((van cam) OR (van cau)) duc va hanh vi ((cua te) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ma hoi. hieu ((van cam) OR (van cau)) duc va hanh vi ((cua te) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ma hoi. hieu ((van cam) OR (van cau)) duc va hanh vi ((cua te) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ma hoi. hieu ((van cam) OR (van cau)) duc va hanh vi ((cua te) or (cuu tre))*.