Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dang xay » dang van, van xay
hanh doi » thanh doi, hanh noi, hang doi
cam thuc » am thuc, nam thuc, cam thu
su sach » so sach, vu sach
doi cua » dai cua, hoi cua
va hanh » van hanh, va thanh, ban hanh
thuc va » thuc vat, thuc dan, thuc day
cua tre » cua te, cuu tre, cua triet
sach ky » sac ky, sach y, sach ty
hieu ve » hieu va
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sach ky dang xay hoi. ((hieu ve) OR (hieu van)) cam thuc va hanh doi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ky dang xay hoi. ((hieu ve) OR (hieu van)) cam thuc va hanh doi cua tre".
• Adding a wildcard symbol may retrieve word variants: su sach ky dang xay hoi. ((hieu ve) OR (hieu van)) cam thuc va hanh doi cua tre*.