Perhaps you should try some spelling variations:
chu bang » thu bang, chu quang, chu trang
thai cua » than cua, tai cuc, tri cua
dau thai » dau thau, da thai, dao thai
te sach » toc sach
van hoi » van hoa, van hoc, van hoe
hieu va » lieu va, hieu qua
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, xac va
luc va » duc va, tuc va, loc va
chuc » thuc, chua, phuc

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 ((chu bang) or (chuc nang)) van hoi. hieu va cac ((xuc va) OR (luc va)) dau thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((chu bang) OR (chuc nang)) van hoi. hieu va cac ((xuc va) OR (luc va)) dau thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((chu bang) or (chuc nang)) van hoi. hieu va cac ((xuc va) OR (luc va)) dau thai cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ((chu bang) or (chuc nang)) van hoi. hieu va cac ((xuc va) OR (luc va)) dau thai cua tre*.