Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
van cham » van chat, van tham, va cham
va hanh » van hanh, va thanh, va danh
sach ky » sac ky, sach y, sach ty
te sach » toc sach
ky sang » ky nang, ky dang, ky tang
ma hoi » mai hoi, ma hoa, me hoi
soc va » hoc va, loc va, doc va

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