Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hoc sach » hoc sinh, hoc cac, hoc anh
tinh de » tinh da, sinh de, tinh he
va tinh » may tinh
cao duc » dao duc, cao suc, giao duc
hieu va » lieu va, hieu qua
te sach » toc sach
va cao » va cac, va co, va dao
y dang » ky dang, 2 dang, _ dang
de cua » le cua, te cua, dieu cua
co hai » co dai, co hoi, so hai
o hai » so hai, o lai, _ hai

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) or (hoc sach)) y dang ((o hai) or (co hai)). hieu va cao duc va tinh de cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((te sach) OR (hoc sach)) y dang ((o hai) OR (co hai)). hieu va cao duc va tinh de cua triet.
• Adding a wildcard symbol may retrieve word variants: ((te sach) or (hoc sach)) y dang ((o hai) or (co hai)). hieu va cao duc va tinh de cua triet*.