Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
toc sach » hoc sach, doc sach, thuoc sach
danh vai » danh va, doanh van, dang van
thu vat » thuc vat, thu va, thuat vat
cam thu » nam thu, cac thu, ca thu
cuu tre » cua tre, cau tren, cau treo
hang ca » hang va, nang cao, hang tai
ty hang » ly hang, ty xang, thi hang
ca hoi » cau hoi, cua hoi, xa hoi
va cam » va cham, va cac, va cao

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) OR (toc sach)) ty hang ca hoi. lieu va cam thu vat ((danh vai) or (danh sai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (toc sach)) ty hang ca hoi. lieu va cam thu vat ((danh vai) OR (danh sai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((te sach) OR (toc sach)) ty hang ca hoi. lieu va cam thu vat ((danh vai) or (danh sai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((te sach) OR (toc sach)) ty hang ca hoi. lieu va cam thu vat ((danh vai) or (danh sai)) cuu tre*.