Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
bach van » bach dan, cach van, bach dang
sach van » sach han, sach va, cach van
duc ban » duc tan, duc van, dua ban
hanh va » hang va, hanh vi
qua ban » cua ban, qua quan
hieu ve » hieu va, hieu van
ve cac » va cac, vien cac
x hoi » xa hoi, o hoi, x ho

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sach van) OR (bach van)) nang x hoi. hieu ve cac ((duc ban) or (qua ban)) hanh va su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sach van) OR (bach van)) nang x hoi. hieu ve cac ((duc ban) OR (qua ban)) hanh va su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sach van) OR (bach van)) nang x hoi. hieu ve cac ((duc ban) or (qua ban)) hanh va su triet*".