Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
su triet » su viet, su tien, ve triet
quan anh » quan hanh, quang anh, tuan anh
hieu sau » hieu suat, tieu su, hieu va
hieu su » tieu su, hieu so, hieu suat
sai ky » sac ky
tu sai » tu bai, tu san, tu cai
x hoi » xa hoi, o hoi, x ho
di su » doi su, ki su, da su

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: tu sai ky nang x hoi. ((hieu sau) OR (hieu su)) pham duc ((van thanh) OR (quan anh)) di su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sai ky nang x hoi. ((hieu sau) OR (hieu su)) pham duc ((van thanh) or (quan anh)) di su triet~".
• Adding a wildcard symbol may retrieve word variants: tu sai ky nang x hoi. ((hieu sau) OR (hieu su)) pham duc ((van thanh) or (quan anh)) di su triet*.