Perhaps you should try some spelling variations:
cua triet » su triet, va triet
nganh ky » nganh y, nganh xay, hanh ky
cac thoi » cac toi, cac hop, cac tro
hanh vai » hanh vi, hanh va, hanh tai
cua viet » ca viet, hoa viet, cua vat
canh ky » hanh ky, canh tay, thanh ky
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
thoi va » hoi va, thai va, tho va
va hanh » van hanh, va thanh, va danh

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

• Performing a fuzzy search may retrieve terms with similar spellings: thu ((canh ky) or (nganh ky)) nang xa hoi. hieu va cac thoi va hanh vai ((cua triet) OR (cua viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: thu ((canh ky) OR (nganh ky)) nang xa hoi. hieu va cac thoi va hanh vai ((cua triet) OR (cua viet)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "thu ((canh ky) or (nganh ky)) nang xa hoi. hieu va cac thoi va hanh vai ((cua triet) OR (cua viet))".
• Adding a wildcard symbol may retrieve word variants: thu ((canh ky) or (nganh ky)) nang xa hoi. hieu va cac thoi va hanh vai ((cua triet) OR (cua viet))*.