Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
pham duy » pham duc
cham duc » pham duc, cham soc, phan duc
te sach » toc sach
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
nang ma » sang ma, nang cao, mang may
tang ma » mang may, tang van
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 _ ((tang ma) or (nang ma)) hoi. hieu ve ((cham duc) OR (pham duy)) gia thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach _ ((tang ma) OR (nang ma)) hoi. hieu ve ((cham duc) OR (pham duy)) gia thanh hai cua tre*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach _ ((tang ma) or (nang ma)) hoi. hieu ve ((cham duc) OR (pham duy)) gia thanh hai cua tre*".