Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
hanh thai » nhanh thai, hinh thai, hanh tai
thai cua » than cua, tai cuc, tri cua
van hanh » van thanh, ban hanh, van anh
duc van » duc va, duc tan, duc manh
cam duc » cam xuc, cao duc, pham duc
hieu va » lieu va
lang ha » long ha
lang xa » dang xay, lang van
tai ky » thai ky, trai ky, sai ky
su tai » su thi, tu tai

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