Perhaps you should try some spelling variations:
te sach » toc sach
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va, hieu van
danh du » danh dau, danh tu, dinh du
cuu tre » cua tre, cau tren, cau treo
ve cac » va cac, vien cac
xuc va » tuc va, luc va, xac va
du cuu » tu cuu

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y ((nang x) OR (nang ma)) hoi. hieu ve cac ((xuc va) OR (duc va)) danh du cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y ((nang x) or (nang ma)) hoi. hieu ve cac ((xuc va) OR (duc va)) danh du cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach y ((nang x) or (nang ma)) hoi. hieu ve cac ((xuc va) OR (duc va)) danh du cuu tre*.