Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
ky tang » ky nang, ky dang, kho tang
tang ho » tang cho, tung ho, tang ha
hanh di » hanh vi, hanh de, hang di
hieu ve » hieu van
hieu va » lieu va, hieu qua
tuc ban » thuc ban, truc ban, tuc dan
tu ban » thu ban, te ban
su xac » pu xac, su cac
xac ky » cac ky, sac ky, bac ky
ho hoi » hoc hoi, hoa hoi, hoi hoi
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: su xac ky tang ho hoi. ((hieu ve) OR (hieu va)) cam ((tuc ban) or (tu ban)) hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su xac ky tang ho hoi. ((hieu ve) OR (hieu va)) cam ((tuc ban) OR (tu ban)) hanh di su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su xac ky tang ho hoi. ((hieu ve) OR (hieu va)) cam ((tuc ban) or (tu ban)) hanh di su triet*".