Perhaps you should try some spelling variations:
sach van » sach han, bach van, cach van
van hanh » van thanh, ban hanh, van anh
su triet » su viet, ve triet
sach va » sach xa, sach ha, sach dao
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
xuc van » duc van, luc van, xuc ban
su tien » su kien, su hien, tu tieng
va cam » va cham, va cac, va cao

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 van) or (sach va)) nang xa hoi. hieu va cam xuc van hanh vi ((su triet) or (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sach van) OR (sach va)) nang xa hoi. hieu va cam xuc van hanh vi ((su triet) OR (su tien)).
• Adding a wildcard symbol may retrieve word variants: tu ((sach van) or (sach va)) nang xa hoi. hieu va cam xuc van hanh vi ((su triet) or (su tien))*.