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

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