Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
can thuc » dan thuc, van thuc, cay thuc
hanh hai » thanh hai, nhanh hai, hang hai
cua tre » cua te, cuu tre, dua tren
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
sach ty » sach y, sach thu, xach tay
sach tu » sach thu, cach tu, sach uu
va can » va chan, va cac, va cao
x hoi » xa hoi, o hoi, x ho

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 ty) OR (sach tu)) nang x hoi. lieu va can thuc va hanh hai ((cua tre) or (cua triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach ty) OR (sach tu)) nang x hoi. lieu va can thuc va hanh hai ((cua tre) OR (cua triet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach ty) OR (sach tu)) nang x hoi. lieu va can thuc va hanh hai ((cua tre) or (cua triet))".
• Adding a wildcard symbol may retrieve word variants: su ((sach ty) OR (sach tu)) nang x hoi. lieu va can thuc va hanh hai ((cua tre) or (cua triet))*.