Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
van hanh » van thanh, van anh, van ban
thai cua » than cua, tai cuc, tri cua
ban hanh » ban hang
ky dang » ky nang, ky danh
dang ha » dong ha, dung ha, lang ha
su tai » su thi, tu tai
tai ky » thai ky, trai ky, sai ky
va cam » va cham, va cao, va cai
ha hoi » hoa hoi, ha noi, xa hoi

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

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