Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh dai » hanh dao, thanh dat, thanh dam
hanh tai » thanh tai, hang tai, han tai
vanh dai » van dai, vanh tai, lanh dao
te sach » toc sach
thuc va » thuc vat, thuc dan, thuc day
hieu ve » hieu va, hieu van
y nang » ky nang, ly nang, v nang
nang o » nang co, nang ho, nang ro
ve am » va am
o hoi » co hoi, o hoc, o 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 y nang o hoi. hieu ve am thuc va ((((hanh dai) OR (vanh dai))) or (hanh tai)) cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang o hoi. hieu ve am thuc va ((((hanh dai) OR (vanh dai))) OR (hanh tai)) cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang o hoi. hieu ve am thuc va ((((hanh dai) OR (vanh dai))) or (hanh tai)) cua triet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang o hoi. hieu ve am thuc va ((((hanh dai) OR (vanh dai))) or (hanh tai)) cua triet*.