Perhaps you should try some spelling variations:
nang van » dang van, lang van, nong van
tang van » dang van, hoang van, trong van
hieu van » hieu va, thien van, lieu va
su triet » su tien, ve triet
nam xuc » cam xuc, nam xua, nam thuc
va hanh » van hanh, va thanh, va danh
su viet » so viet
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
xuc va » duc va, tuc va, luc va

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

• Performing a fuzzy search may retrieve terms with similar spellings: su sac ky ((nang van) or (tang van)) hoe. hieu van nam xuc va hanh vi ((su triet) OR (su viet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su sac ky ((nang van) OR (tang van)) hoe. hieu van nam xuc va hanh vi ((su triet) OR (su viet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky ((nang van) or (tang van)) hoe. hieu van nam xuc va hanh vi ((su triet) OR (su viet))*".