Perhaps you should try some spelling variations:
su triet » su viet, su tien
ve triet » va trien
van hanh » van thanh, ban hanh, van anh
cham xuc » cam xuc, chat xuc, cham soc
sach vu » sach va, sach tu, sach uu
hanh ki » hanh vi, hanh ky, hanh kien
xuc van » duc van, luc van, vuc van
tu sach » thu sach, su sach, te sach
hieu va » lieu va, hieu qua
mai hoi » mai khoi, dai hoi, lai hoi
vu dang » su dang, vu quang, cua dang
va cham » va chat, va tham
ma hoi » xa hoi, ma hoa, me hoi

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach vu dang ((ma hoi) or (mai hoi)). hieu va cham xuc van hanh ki ((ve triet) OR (su triet))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu dang ((ma hoi) OR (mai hoi)). hieu va cham xuc van hanh ki ((ve triet) OR (su triet))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach vu dang ((ma hoi) or (mai hoi)). hieu va cham xuc van hanh ki ((ve triet) OR (su triet))*".