Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc day » thuc dan
van cam » van nam, van lam, van cau
dinh di » dinh du, dinh vi, danh di
cua tre » cua te, cuu tre, cua triet
va sac » va cac, va suc, va san
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.

• Performing a fuzzy search may retrieve terms with similar spellings: va sac ky nang x hoi. hieu van cam ((thuc vat) or (thuc day)) dinh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: va sac ky nang x hoi. hieu van cam ((thuc vat) OR (thuc day)) dinh di cua tre.
• Adding a wildcard symbol may retrieve word variants: va sac ky nang x hoi. hieu van cam ((thuc vat) or (thuc day)) dinh di cua tre*.