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

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 khoi)). hieu va cham xuc van hanh ki ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach vu dang ((ma hoi) OR (mai khoi)). hieu va cham xuc van hanh ki ve triet.
• Adding a wildcard symbol may retrieve word variants: tu sach vu dang ((ma hoi) or (mai khoi)). hieu va cham xuc van hanh ki ve triet*.