Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
ban thanh » ban hanh, ban hang
chet duoc » che duoc, cho duoc, che quoc
chat duc » chat xuc, chat doc, pham duc
te sach » toc sach
hieu ve » hieu va, hieu van
ty hang » ly hang, ty xang, thi hang
ty sang » ty xang, duy sang, thu sang
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 ((ty sang) or (ty hang)) ma hoi. hieu ve ((chat duc) OR (chet duoc)) ban thanh dai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((ty sang) OR (ty hang)) ma hoi. hieu ve ((chat duc) OR (chet duoc)) ban thanh dai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((ty sang) or (ty hang)) ma hoi. hieu ve ((chat duc) OR (chet duoc)) ban thanh dai cua tre*".