Perhaps you should try some spelling variations:
toc sach » hoc sach, doc sach, thuoc sach
hieu van » hieu va, thien van, lieu va
danh vi » hanh vi, dinh vi, danh di
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
xuc va » duc va, luc va, xac va
tuc va » thuc va, truc va, tuc xa
ma hoi » mai hoi, xa hoi, ma hoa
vi cuu » vi luu, vinh 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: toc sach y nang ma hoi. ((hieu ve) OR (hieu van)) cam ((xuc va) OR (tuc va)) danh vi cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc sach y nang ma hoi. ((hieu ve) OR (hieu van)) cam ((xuc va) or (tuc va)) danh vi cuu tre~".
• Adding a wildcard symbol may retrieve word variants: toc sach y nang ma hoi. ((hieu ve) OR (hieu van)) cam ((xuc va) or (tuc va)) danh vi cuu tre*.