Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
su triet » su viet, su tien, ve triet
sang ky » sang kyo, tang ky, bang ky
dang ky » dang y, dong ky, dang xay
lang xa » lang ha, dang xay, lang van
cac vuc » cac nuoc, cac vung, cac cuoc
vuc van » duc van, luc van, thuc van
hanh di » hanh vi, hanh de, hang di
dan ky » van ky
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 ((((sang ky) or (dang ky))) or (dan ky)) lang xa hoi. lieu va cac vuc van hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((((sang ky) OR (dang ky))) OR (dan ky)) lang xa hoi. lieu va cac vuc van hanh di su triet.
• Adding a wildcard symbol may retrieve word variants: tu ((((sang ky) or (dang ky))) or (dan ky)) lang xa hoi. lieu va cac vuc van hanh di su triet*.