Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
phan thuc » nhan thuc, phap thuc, pham thuc
canh may » canh tay, hanh may, mang may
may nang » may nong, ky nang, cam nang
da thanh » dao thanh, dat thanh, dam thanh
day hanh » day nhanh, day thanh, dao hanh
so canh » so sanh, bo canh, so danh
hieu va » lieu va, hieu qua
hieu ve » hieu van
x hoi » xa hoi, o hoi, x ho

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

• Performing a fuzzy search may retrieve terms with similar spellings: so canh may nang x hoi. ((hieu ve) OR (hieu va)) phan thuc ((day hanh) or (da thanh)) dai cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: so canh may nang x hoi. ((hieu ve) OR (hieu va)) phan thuc ((day hanh) OR (da thanh)) dai cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "so canh may nang x hoi. ((hieu ve) OR (hieu va)) phan thuc ((day hanh) or (da thanh)) dai cua triet".
• Adding a wildcard symbol may retrieve word variants: so canh may nang x hoi. ((hieu ve) OR (hieu va)) phan thuc ((day hanh) or (da thanh)) dai cua triet*.