Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
nam thuc » nam thuoc, am thuc, nam thu
ky tang » ky nang, ky dang, kho tang
tang xa » trang xa, tang ma, lang xa
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
su sac » su sach, su cac, su xac
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: su sac ky tang xa hoi. hieu van nam thuc va ((thanh hoa) OR (thanh pho)) cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky tang xa hoi. hieu van nam thuc va ((thanh hoa) OR (thanh pho)) cua tre".
• Adding a wildcard symbol may retrieve word variants: su sac ky tang xa hoi. hieu van nam thuc va ((thanh hoa) OR (thanh pho)) cua tre*.