Perhaps you should try some spelling variations:
thanh hoai » thanh hoa, thanh hai, thanh oai
nam thuoc » nam thuc, nam thu, nha thuoc
thuoc day » thuc day, thuoc dac, thuoc dang
day thanh » dao thanh, dat thanh, da thanh
hieu van » hieu va, thien van, lieu va
hoai cua » hoi cua, hoa cua, hai cua
sach ky » sac ky, sach ty, sach kem
nang xa » nang x, lang xa, nang ma
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: hoc ((sach ky) or (sach y)) nang xa hoi. hieu van nam thuoc day thanh hoai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((sach ky) OR (sach y)) nang xa hoi. hieu van nam thuoc day thanh hoai cua tre.
• Adding a wildcard symbol may retrieve word variants: hoc ((sach ky) or (sach y)) nang xa hoi. hieu van nam thuoc day thanh hoai cua tre*.