Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
lang xa » lang ha, dang xay, lang van
hieu va » hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
sach o » sach lo, sac o, sach y
o lang » hoa lang, hoi lang

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 o lang xa hoi. ((hieu va) or (lieu va)) cam duc va hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach o lang xa hoi. ((hieu va) OR (lieu va)) cam duc va hanh dai cua triet.
• Adding a wildcard symbol may retrieve word variants: te sach o lang xa hoi. ((hieu va) or (lieu va)) cam duc va hanh dai cua triet*.