Perhaps you should try some spelling variations:
day hanh » day nhanh, day thanh, dao hanh
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
hieu van » hieu va, thien van, lieu va
cam thuc » am thuc, nam thuc, cam thu
thuc day » thuc dan, thuc vat
cua tre » cua te, cuu tre, cua triet
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu va
vai cua » dai cua, hai cua, lai cua
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac 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 xac ky dang xay hoi. ((hieu ve) OR (hieu van)) cam thuc day hanh vai cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky dang xay hoi. ((hieu ve) OR (hieu van)) cam thuc day hanh vai cua tre".
• Adding a wildcard symbol may retrieve word variants: su xac ky dang xay hoi. ((hieu ve) OR (hieu van)) cam thuc day hanh vai cua tre*.