Perhaps you should try some spelling variations:
thanh dai » thanh hai, thanh tai, thanh dat
hieu van » hieu va, thien van, lieu va
van cac » van hac, van cau, van bac
cuu tre » cau tren, cau treo
suc gia » duc gia, luc gia, tuc gia
cac suc » cao suc, cac nuoc, cac cuoc
te sach » toc sach
cua tre » cua te, cua triet, dua tren
y tang » ky tang, 6 tang, 5 tang
ma hoi » mai hoi, xa hoi, ma hoa
7 tang » 6 tang

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 ((y tang) or (7 tang)) ma hoi. hieu van cac suc gia thanh dai ((cuu tre) or (cua tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((y tang) OR (7 tang)) ma hoi. hieu van cac suc gia thanh dai ((cuu tre) OR (cua tre)).
• Adding a wildcard symbol may retrieve word variants: te sach ((y tang) or (7 tang)) ma hoi. hieu van cac suc gia thanh dai ((cuu tre) or (cua tre))*.