Perhaps you should try some spelling variations:
dang xay » dang van, van xay
su triet » su viet, su tien, ve triet
ky dang » ky nang, ky danh
xay hoi » xa hoi, tay hoi, cay phoi
hieu ve » hieu van
hieu va » lieu va, hieu qua
cam duc » cam xuc, cao duc, pham duc
va hanh » van hanh, va thanh, va danh
hanh va » hang va, hanh vi
tu san » thu san, tu ban, tu can

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((tu san) or (tu cac)) ky dang xay hoi. ((hieu ve) or (hieu va)) cam duc va hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu cac)) ky dang xay hoi. ((hieu ve) OR (hieu va)) cam duc va hanh va su triet.
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (tu cac)) ky dang xay hoi. ((hieu ve) or (hieu va)) cam duc va hanh va su triet*.