Perhaps you should try some spelling variations:
cam thuc » am thuc, nam thuc, cam thu
thuc day » thuc dan, thuc vat
dang xay » dang van, van xay
hanh vai » hanh vi, hanh va, hanh tai
day hanh » day nhanh, day thanh, dao hanh
cua tre » cua te, cua triet, dua tren
cuu tre » cau tren, cau treo
hieu ve » hieu va, hieu van
xay hoi » xa hoi, tay hoi, cay phoi
ky dang » ky nang, ky danh
xac ky » cac ky, sac ky, bac ky
ve cam » ve cham, ve cac, va cam
su xac » pu xac, su cac

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 cam thuc day hanh vai ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky dang xay hoi. hieu ve cam thuc day hanh vai ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: su xac ky dang xay hoi. hieu ve cam thuc day hanh vai ((cua tre) OR (cuu tre))*.