Perhaps you should try some spelling variations:
thanh tai » thanh hai, thanh toan, doanh tai
ban thanh » ban hanh, ban hang
toc sach » hoc sach, doc sach, thuoc sach
tai cua » thai cua, tai cuc, tri cua
xuc ban » duc ban, cuc ban, quoc ban
hieu va » lieu va, hieu qua
hieu ve » hieu van
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa

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) OR (toc sach)) ky dang ma hoi. ((hieu ve) or (hieu va)) cam xuc ban thanh tai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ky dang ma hoi. ((hieu ve) OR (hieu va)) cam xuc ban thanh tai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ky dang ma hoi. ((hieu ve) or (hieu va)) cam xuc ban thanh tai cua tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ky dang ma hoi. ((hieu ve) or (hieu va)) cam xuc ban thanh tai cua tre*.