Perhaps you should try some spelling variations:
sach ky » sac ky, sach ty, sach kem
cua tre » cua te, cua triet, dua tren
danh vi » hanh vi, dinh vi, danh di
va danh » va dinh, va dan, va hanh
cam duc » cam xuc, cao duc, pham duc
cuu tre » cau tren, cau treo
hieu va » lieu va, hieu qua
va cam » va cham, 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: cuon ((sach ky) OR (sach y)) nang x hoi. hieu va cam duc va danh vi ((cua tre) OR (cuu tre))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "cuon ((sach ky) OR (sach y)) nang x hoi. hieu va cam duc va danh vi ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: cuon ((sach ky) OR (sach y)) nang x hoi. hieu va cam duc va danh vi ((cua tre) OR (cuu tre))*.