Perhaps you should try some spelling variations:
hieu cao » chieu cao, hieu cac, hieu ca
chat xuc » chat huu, cam xuc, chao xu
hanh ve » hanh vi, hanh va
xuc van » duc van, luc van, vuc van
sach ky » sac ky, sach y, sach kem
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cuu tre, cua triet
x hoi » xa hoi, o hoi, x ho

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) OR (sach ty)) nang x hoi. hieu cao chat xuc van ((hanh ve) or (hanh kem)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ky) OR (sach ty)) nang x hoi. hieu cao chat xuc van ((hanh ve) OR (hanh kem)) cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ky) OR (sach ty)) nang x hoi. hieu cao chat xuc van ((hanh ve) or (hanh kem)) cua tre".
• Adding a wildcard symbol may retrieve word variants: te ((sach ky) OR (sach ty)) nang x hoi. hieu cao chat xuc van ((hanh ve) or (hanh kem)) cua tre*.