Perhaps you should try some spelling variations:
quoc ban » quoc bao, quoc lan, quoc quan
hanh vai » hanh vi, hanh va, hanh tai
te sach » toc sach
ky lang » ky nang, ky dang, tay lang
ky tang » ky nang, ky dang, kho tang
xuc ban » duc ban, cuc ban, xuat ban
vai cua » dai cua, hai cua, lai cua
cua tre » cua te, cuu tre, cua triet

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 lang) or (ky tang)) xa hoi. lieu va cac ((xuc ban) OR (quoc ban)) hanh vai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ky lang) OR (ky tang)) xa hoi. lieu va cac ((xuc ban) OR (quoc ban)) hanh vai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ky lang) or (ky tang)) xa hoi. lieu va cac ((xuc ban) OR (quoc ban)) hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((ky lang) or (ky tang)) xa hoi. lieu va cac ((xuc ban) OR (quoc ban)) hanh vai cua tre*.