Perhaps you should try some spelling variations:
lang van » tang van, hoang van, giang van
dang van » hoang van, hang va
hieu van » hieu va, thien van, lieu va
va hanh » van hanh, va thanh, va danh
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
van am » van nam, van lam, van dam
am hoc » ad hoc
vi cua » vai cua, di cua
cua cu » cua chu, cua cau, cua su

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((lang van) OR (dang van)) hoi. hieu van am hoc va hanh vi cua cu~".
• Adding a wildcard symbol may retrieve word variants: su sac ky ((lang van) OR (dang van)) hoi. hieu van am hoc va hanh vi cua cu*.