Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
tinh dat » tinh da, dinh dat, tinh dau
te sach » toc sach
dat cuu » dat cau, dat cua
va tinh » may tinh
cac dai » cac dan, cac bai, can dai
cac day » cac dan, cac cay, cac dac
nang ma » tang ma, sang ma, nang cao
hieu ve » hieu va
cuu tre » cua tre, cau tren, cau treo
y nang » ky nang, ly nang, v nang
ma hoi » mai hoi, xa hoi, ma hoa

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 ma hoi. ((hieu ve) OR (hieu van)) ((cac day) OR (cac dai)) va tinh dat cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ma hoi. ((hieu ve) or (hieu van)) ((cac day) OR (cac dai)) va tinh dat cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ma hoi. ((hieu ve) or (hieu van)) ((cac day) OR (cac dai)) va tinh dat cuu tre*.