Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
thuc va » thuc vat, thuc dan, thuc day
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
cuu tre » cua tre, cau tren, cau treo
vu sac » vu sach, vu san, va sac
sac ky » cac ky, sai ky
van am » van nam, van lam, van dam
di cuu » di cau, di cua, dinh cuu

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

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