Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
doc sach » toc sach, nuoc sach, dac sac
hoc sach » hoc sinh, hoc cac, hoc anh
hai cua » thai cua, dai cua, hoi cua
hieu ve » hieu va, hieu van
sang ma » tang ma, nang ma, sang tao
cua tre » cua te, cuu tre, cua triet
ma hoi » mai hoi, xa hoi, ma hoa
y sang » _ sang, duy sang

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: ((doc sach) or (hoc sach)) y sang ma hoi. hieu ve ((pham duy) or (pham duc)) gia thanh hai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc sach) OR (hoc sach)) y sang ma hoi. hieu ve ((pham duy) OR (pham duc)) gia thanh hai cua tre.
• Adding a wildcard symbol may retrieve word variants: ((doc sach) or (hoc sach)) y sang ma hoi. hieu ve ((pham duy) or (pham duc)) gia thanh hai cua tre*.