Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
soc van » hoc van, oc van, sac van
va tham » van tham, va thanh, va thuat
va cham » va chat
ty hang » ly hang, ty xang, thi hang
ty nang » ky nang, ty xang, ly nang
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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