Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh tai » thanh tai, hang tai, han tai
hanh dai » hanh dao, vanh dai, thanh dat
thuc va » thuc vat, thuc dan, thuc day
te sach » toc sach
hieu va » lieu va, hieu qua
ly nang » ky nang, ly hang, ly vang
y nang » ky nang, v nang, may nang
o hoi » co hoi, o hoc, o hai
va am » va lam, va cam

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