Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, ban hanh, van anh
hoi cua » hoi chuc
va danh » va dinh, va dan, va hanh
cao hoi » cau hoi, co hoi, cao hoc
hieu va » lieu va, hieu qua
xac ky » cac ky, bac ky
sac ky » cac ky, sai ky
va cam » va cham, va cac, va cao

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((xac ky) OR (sac ky)) nang cao hoi. hieu va cam xuc ((van hanh) or (va danh)) hoi cua triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((xac ky) OR (sac ky)) nang cao hoi. hieu va cam xuc ((van hanh) OR (va danh)) hoi cua triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((xac ky) OR (sac ky)) nang cao hoi. hieu va cam xuc ((van hanh) or (va danh)) hoi cua triet".
• Adding a wildcard symbol may retrieve word variants: su ((xac ky) OR (sac ky)) nang cao hoi. hieu va cam xuc ((van hanh) or (va danh)) hoi cua triet*.