Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cuu tre » cau tren, cau treo
cua tre » cua triet, dua tren, cua thep
dai van » dao van, dai han, dai va
sach ly » sach y, sach lo, sach ty
cac dai » cac dan, cac bai, can dai
van cac » van hac, van cau, van bac
ly nang » ky nang, ly hang, ly vang
cua te » cua tu
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ly nang x hoi. hieu van cac dai van thanh hai ((((cua tre) or (cuu tre))) or (cua te))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ly nang x hoi. hieu van cac dai van thanh hai ((((cua tre) OR (cuu tre))) OR (cua te)).
• Adding a wildcard symbol may retrieve word variants: tu sach ly nang x hoi. hieu van cac dai van thanh hai ((((cua tre) or (cuu tre))) or (cua te))*.