Perhaps you should try some spelling variations:
thanh dat » thanh san, thanh van, thanh ha
thanh hai » thanh phan, thanh hoa, thanh san
hieu van » hieu va, thien van, lieu va
te sach » toc sach
cac dac » cac dan, cac dai, cac bac
sach ly » sach y, sach lo, sach ty
hieu ve » hieu va
nang ma » tang ma, sang ma, nang cao
ly nang » ky nang, ly hang, ly vang
cuu tre » cua tre, cau tren, cau treo
dac va » duc va, day va, dat va
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 ly nang ma hoi. ((hieu ve) OR (hieu van)) cac dac va ((thanh dat) OR (thanh hai)) cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ly nang ma hoi. ((hieu ve) or (hieu van)) cac dac va ((thanh dat) OR (thanh hai)) cuu tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ly nang ma hoi. ((hieu ve) or (hieu van)) cac dac va ((thanh dat) OR (thanh hai)) cuu tre*.