Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh tai, hanh dao, vanh dai
va hanh » van hanh, va thanh, va danh
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
tu sach » thu sach, su sach, tu cach
ty nang » ky nang, ty xang, ty hang
te sach » toc sach
o hai » co hai, so hai, o lai
x hoi » xa hoi, o hoi, x ho
ve am » va am

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) OR (te sach)) ty nang ((x hoi) or (o hai)). hieu ve am thuc va hanh dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sach) OR (te sach)) ty nang ((x hoi) OR (o hai)). hieu ve am thuc va hanh dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sach) OR (te sach)) ty nang ((x hoi) or (o hai)). hieu ve am thuc va hanh dai cua triet".
• Adding a wildcard symbol may retrieve word variants: ((tu sach) OR (te sach)) ty nang ((x hoi) or (o hai)). hieu ve am thuc va hanh dai cua triet*.