Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cao thuc » cao thuoc, bao thuc, can thuc
vat hanh » vat thanh, van hanh, va hanh
hanh dai » hanh tai, hanh dao, vanh dai
te sach » toc sach
cua tre » cua te, cuu tre, dua tren
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
va cao » va cac, va co, va dao
o hoi » co hoi, o hoc, o hai

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

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang o hoi. lieu va cao thuc vat hanh dai ((cua tre) OR (cua triet))~.
• Adding a wildcard symbol may retrieve word variants: te sach y nang o hoi. lieu va cao thuc vat hanh dai ((cua tre) or (cua triet))*.