Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ky dang » ky nang
ky danh » ky anh
va tham » van tham, va cham, va thanh
xuc van » luc van, vuc van, xuc ban
duc van » duc va, duc tan, duc manh
hanh di » hanh vi, hanh de, hang di
tu san » thu san, tu ban, tu can
di su » doi su, ki su, da su

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 ((ky dang) OR (ky danh)) xa hoi. lieu va tham ((xuc van) or (duc van)) hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ky dang) OR (ky danh)) xa hoi. lieu va tham ((xuc van) OR (duc van)) hanh di su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ky dang) OR (ky danh)) xa hoi. lieu va tham ((xuc van) or (duc van)) hanh di su triet".
• Adding a wildcard symbol may retrieve word variants: tu san ((ky dang) OR (ky danh)) xa hoi. lieu va tham ((xuc van) or (duc van)) hanh di su triet*.