Perhaps you should try some spelling variations:
thanh van » thanh san, thanh toan, thanh phan
vat thanh » dat thanh, gat thanh, tat thanh
toc sach » hoc sach, doc sach, thuoc sach
tang van » dang van, hoang van, trong van
tu sach » thu sach, su sach, te sach
vien da » vien dai, hien dai
van cua » vang cua, ban cua, dan cua
van hoi » van hoa, van hoc, van hoe
ky tang » ky nang, ky dang, kho tang
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: ((tu sach) or (toc sach)) ky tang van hoi. hieu ((va cac) or (vien da)) thuc vat thanh van cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (toc sach)) ky tang van hoi. hieu ((va cac) OR (vien da)) thuc vat thanh van cua tre.
• Adding a wildcard symbol may retrieve word variants: ((tu sach) or (toc sach)) ky tang van hoi. hieu ((va cac) or (vien da)) thuc vat thanh van cua tre*.