Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
can thanh » ban thanh, van thanh, cac thanh
pham duy » pham duc
te sach » toc sach
hieu va » lieu va, hieu qua
duy can » duy van
cua tre » cua te, cuu tre, cua triet
hieu ve » hieu van
ty hang » ly hang, ty xang, thi hang
ty sang » ty xang, duy sang, thu sang

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 hoa. ((hieu ve) OR (hieu va)) pham duy can 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 hoa. ((hieu ve) OR (hieu va)) pham duy can 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 hoa. ((hieu ve) OR (hieu va)) pham duy can thanh dai cua tre*".