Perhaps you should try some spelling variations:
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
hieu va » lieu va, hieu qua
cam tuc » cam xuc, cam tu, nam thuc
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
dan ky » van ky
va cam » va cham, va cac, va cao
tuc va » thuc va, truc va, tuc xa
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 ((dan ky) or (((sang ky) OR (dang ky)))) lang xa hoi. hieu va cam tuc va hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((dan ky) OR (((sang ky) OR (dang ky)))) lang xa hoi. hieu va cam tuc va hanh di su triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu ((dan ky) or (((sang ky) OR (dang ky)))) lang xa hoi. hieu va cam tuc va hanh di su triet".
• Adding a wildcard symbol may retrieve word variants: tu ((dan ky) or (((sang ky) OR (dang ky)))) lang xa hoi. hieu va cam tuc va hanh di su triet*.