Perhaps you should try some spelling variations:
thanh dai » thanh tai, thanh dat, thanh oai
thanh hai » thanh phan, thanh hoa, thanh san
thu sach » tu sach, thuat sach, thuoc sach
tang van » dang van, hoang van, trong van
sach ty » sach y, sach tu, sach thu
lang xa » lang ha, dang xay, lang van
qua cam » qua cham, qua cac, qua ca
cua tre » cua te, cuu tre, cua triet
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu sach ty ((tang van) or (lang xa)) hoi. hieu qua cam xuc va ((thanh dai) or (thanh hai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu sach ty ((tang van) OR (lang xa)) hoi. hieu qua cam xuc va ((thanh dai) OR (thanh hai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: thu sach ty ((tang van) or (lang xa)) hoi. hieu qua cam xuc va ((thanh dai) or (thanh hai)) cua tre*.