Perhaps you should try some spelling variations:
thanh hai » thanh phan, thanh hoa, thanh san
thanh tai » thanh toan, doanh tai, thanh san
dang vat » dang van, dong vat, dang nhat
te sach » toc sach
cam luc » cam xuc, cau luc
cuu tre » cua tre, cau tren, cau treo
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va, hieu van
dang ma » dang mau, dang mam, dang mat
luc va » duc va, tuc va, loc va
ve cam » ve cham, ve cac, va cam

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 ky ((dang ma) or (dang vat)) hoi. hieu ve cam luc va ((thanh tai) OR (thanh hai)) cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((dang ma) OR (dang vat)) hoi. hieu ve cam luc va ((thanh tai) OR (thanh hai)) cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((dang ma) or (dang vat)) hoi. hieu ve cam luc va ((thanh tai) OR (thanh hai)) cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((dang ma) or (dang vat)) hoi. hieu ve cam luc va ((thanh tai) OR (thanh hai)) cuu tre*.