Perhaps you should try some spelling variations:
ve triet » va trien, su triet
van hanh » van thanh, ban hanh, van anh
mai khoi » mai khoa, tai khoa, cac khoi
sach vu » sach va, sach tu, sach xu
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
mai hoi » dai hoi, lai hoi, mai doi
sach uu » sach luu, sach tu, sach xu
va cam » va cham, va cac, va cao
vi ve » va ve, gi ve, ve 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) or (sach uu)) nang ((mai hoi) or (mai khoi)). hieu va cam xuc van hanh vi ve triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach vu) OR (sach uu)) nang ((mai hoi) OR (mai khoi)). hieu va cam xuc van hanh vi ve triet.
• Adding a wildcard symbol may retrieve word variants: tu ((sach vu) or (sach uu)) nang ((mai hoi) or (mai khoi)). hieu va cam xuc van hanh vi ve triet*.