Perhaps you should try some spelling variations:
danh het » danh viet, danh hieu, danh bat
sach ty » sach y, sach tu, sach thu
cua tre » cua te, cua triet, dua tren
va danh » va dinh, va dan, va hanh
cao duc » dao duc, cao suc, giao duc
cuu tre » cau tren, cau treo
hieu va » lieu va, hieu qua
nang xa » nang x, lang xa, nang ma
cach tu » cach thuc
va cao » va cac, va co, va dao

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

• Performing a fuzzy search may retrieve terms with similar spellings: te ((sach ty) or (cach tu)) nang xa hoi. hieu va cao duc va danh het ((cua tre) OR (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te ((sach ty) OR (cach tu)) nang xa hoi. hieu va cao duc va danh het ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te ((sach ty) or (cach tu)) nang xa hoi. hieu va cao duc va danh het ((cua tre) OR (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te ((sach ty) or (cach tu)) nang xa hoi. hieu va cao duc va danh het ((cua tre) OR (cuu tre))*.