Perhaps you should try some spelling variations:
danh sai » dung sai, danh bat, danh dau
danh dai » danh dau, danh di, vanh dai
cam duc » cam xuc, cao duc, pham duc
cua tre » cua te, cuu tre, cua triet
sach ty » sach tu, sach thu, xach tay
hieu va » lieu va, hieu qua
dong xa » dong xay, duong xa, dong ha
va cam » va cham, va cac, va cao

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

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