Perhaps you should try some spelling variations:
day thanh » dao thanh, dat thanh, da thanh
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan, thuc vat
thanh ho » thanh pho, thanh hoa, thanh hoc
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo
van am » van nam, van lam, van dam
ho cuu » ho chu, ho cua, so cuu

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

• Performing a fuzzy search may retrieve terms with similar spellings: toc ((sach ky) or (sach y)) nang xa hoi. hieu van am thuc day thanh ho cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((sach ky) OR (sach y)) nang xa hoi. hieu van am thuc day thanh ho cuu tre.
• Adding a wildcard symbol may retrieve word variants: toc ((sach ky) or (sach y)) nang xa hoi. hieu van am thuc day thanh ho cuu tre*.