Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
cac truc » cau truc, cac tru, cac trung
cuu tre » cua tre, cau tren, cau treo
truc va » thuc va, thuc vat, trung va
van cac » van hac, van cau, van bac
sach ty » sach y, sach tu, sach thu
su sach » so sach, vu sach
nang ma » tang ma, sang ma, nang cao
nang xa » nang x, lang xa, mang xa
va anh » van anh, va danh, va hanh
anh va » hanh va
cua te » cua tu

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: su sach ty ((nang xa) OR (nang ma)) hoi. hieu van cac truc va anh va ((cuu tre) OR (cua te))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ty ((nang xa) OR (nang ma)) hoi. hieu van cac truc va anh va ((cuu tre) or (cua te))~".
• Adding a wildcard symbol may retrieve word variants: su sach ty ((nang xa) OR (nang ma)) hoi. hieu van cac truc va anh va ((cuu tre) or (cua te))*.