Perhaps you should try some spelling variations:
ba trung » nam trung, do trung, le trung
va triet » va thiet, va trien, ve triet
su sach » so sach, vu sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
sach v » sach va, sach y, sach 2
v nang » va nang, vu nang, van nang
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 v nang xa hoi. hieu va ((ba trung) OR (tai trung)) va hanh vi va triet~".
• Adding a wildcard symbol may retrieve word variants: su sach v nang xa hoi. hieu va ((ba trung) OR (tai trung)) va hanh vi va triet*.