Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ky lang » ky dang, ky tang, tay lang
va tham » van tham, va cham, va thanh
vuc van » duc van, luc van, thuc van
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 lang) OR (ky nang)) xa hoi. lieu va tham ((vuc van) or (duc tan)) hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu san ((ky lang) OR (ky nang)) xa hoi. lieu va tham ((vuc van) OR (duc tan)) hanh di su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu san ((ky lang) OR (ky nang)) xa hoi. lieu va tham ((vuc van) or (duc tan)) hanh di su triet".
• Adding a wildcard symbol may retrieve word variants: tu san ((ky lang) OR (ky nang)) xa hoi. lieu va tham ((vuc van) or (duc tan)) hanh di su triet*.