Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
hanh tai » thanh tai, hang tai, han tai
ky dang » ky nang, ky danh
dang ma » dang mau, dang mam, dang mat
thuc va » thuc vat, thuc dan, thuc day
hanh va » hang va, hanh vi
cua tre » cua te, cuu tre, cua triet
te sac » te sach, te cac, te san
sac ky » cac ky, sai ky

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

• Performing a fuzzy search may retrieve terms with similar spellings: te sac ky dang ma hoa. hieu van nam thuc va ((hanh va) or (hanh tai)) cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sac ky dang ma hoa. hieu van nam thuc va ((hanh va) OR (hanh tai)) cua tre.
• Adding a wildcard symbol may retrieve word variants: te sac ky dang ma hoa. hieu van nam thuc va ((hanh va) or (hanh tai)) cua tre*.