Perhaps you should try some spelling variations:
hanh vai » hanh vi, hanh va, hanh tai
tu sach » thu sach, su sach, te sach
ky lang » ky tang, tay lang
ky dang » ky danh
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ((((ky lang) OR (ky nang))) or (ky dang)) xa hoi. hieu va cam xuc va hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((((ky lang) OR (ky nang))) OR (ky dang)) xa hoi. hieu va cam xuc va hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ((((ky lang) OR (ky nang))) or (ky dang)) xa hoi. hieu va cam xuc va hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ((((ky lang) OR (ky nang))) or (ky dang)) xa hoi. hieu va cam xuc va hanh vai cua tre*.