Perhaps you should try some spelling variations:
hieu cao » chieu cao, hieu cac, hieu ca
sach ky » sach y, sach ty, sach kem
cao cau » cao cap, co cau, tao cau
truc va » thuc va, thuc vat, trung va
va danh » va dinh, va dan, va hanh
danh di » danh du, xanh di, danh dien
cua tre » cua te, cuu tre, cua triet
sac ky » cac ky, sai ky
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho

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: thu ((sach ky) OR (sac ky)) nang x hoi. hieu cao cau truc va danh di cua tre~.
• Adding a wildcard symbol may retrieve word variants: thu ((sach ky) or (sac ky)) nang x hoi. hieu cao cau truc va danh di cua tre*.