Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
hanh di » hanh vi, hanh de, hang di
tuc ban » thuc ban, truc ban, tuc dan
hieu ve » hieu va, hieu van
tang ho » tang cho, tung ho, tang ha
ky tang » ky nang, ky dang, kho tang
ve cam » ve cham, ve cac, va cam
bac ky » cac ky, ban ky, sac ky
ho hoi » hoc hoi, hoa hoi, hoi hoi
tu ban » thu ban, te ban
su bac » xu bac, du bac, su cac
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 bac ky tang ho hoi. hieu ve cam ((tuc ban) or (tu ban)) hanh di su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su bac ky tang ho hoi. hieu ve cam ((tuc ban) OR (tu ban)) hanh di su triet*.