Perhaps you should try some spelling variations:
chat truc » cau truc, chat xuc
hieu cao » chieu cao, hieu cac, hieu ca
danh dai » danh dau, danh sai, vanh dai
danh di » danh du, xanh di, danh dien
truc va » thuc va, thuc vat, trung va
sach ky » sac ky, sach y, sach ty
te sach » toc sach
nang xa » nang x, lang xa, mang xa
nang ma » tang ma, sang ma, nang cao
cua tre » cua te, cuu tre, cua triet

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sach ky ((nang xa) OR (nang ma)) hoi. hieu cao chat truc va ((danh dai) or (danh di)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky ((nang xa) OR (nang ma)) hoi. hieu cao chat truc va ((danh dai) OR (danh di)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky ((nang xa) OR (nang ma)) hoi. hieu cao chat truc va ((danh dai) or (danh di)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky ((nang xa) OR (nang ma)) hoi. hieu cao chat truc va ((danh dai) or (danh di)) cua tre*.