Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
cua triet » cua viet, su triet, va triet
thuc dang » thuoc dang, thuc dan, thuc dung
thanh ha » thanh hoa, thanh hai, nhanh ha
cam thuc » am thuc, nam thuc, cam thu
sach ky » sac ky, sach y, sach ty
cua tre » cua te, cuu tre, dua tren
te sach » toc sach
hieu va » lieu va, hieu qua
ky dang » ky nang, ky danh
ha hoi » hoa hoi, xa hoi, va hoi
va cam » va cham, va cac, va cao

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky dang ((ha hoi) OR (ha noi)). hieu va cam thuc dang thanh ha ((cua tre) OR (cua triet))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky dang ((ha hoi) OR (ha noi)). hieu va cam thuc dang thanh ha ((cua tre) or (cua triet))~".
• Adding a wildcard symbol may retrieve word variants: te sach ky dang ((ha hoi) OR (ha noi)). hieu va cam thuc dang thanh ha ((cua tre) or (cua triet))*.