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
va cham » va chat, va tham
cua tre » cuu tre, cua triet, dua tren
dang ma » dang mau, dang mam, dang mat
ky dang » ky nang, ky danh
va cam » va cac, va cao, va cai
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 ((va cam) OR (va cham)) duc va hanh vi ((cua te) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ma hoi. hieu ((va cam) OR (va cham)) duc va hanh vi ((cua te) OR (cua tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ma hoi. hieu ((va cam) OR (va cham)) duc va hanh vi ((cua te) or (cua tre))".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ma hoi. hieu ((va cam) OR (va cham)) duc va hanh vi ((cua te) or (cua tre))*.