Perhaps you should try some spelling variations:
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
ky lang » ky dang, ky tang, tay lang
qua hau » qua hai, qua bau, qua dau
hau loc » huu loc, phau hoc
va danh » va dinh, va dan, va hanh
danh vi » hanh vi, dinh vi, danh di
loc va » hoc va, luc va
vi va » vi van, vai va, vu va

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 sach ((ky lang) OR (ky nang)) xa hoi. hieu qua hau loc va danh vi va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ky lang) OR (ky nang)) xa hoi. hieu qua hau loc va danh vi va triet*.