Perhaps you should try some spelling variations:
su triet » su viet, ve triet
tu sach » thu sach, su sach, te sach
duc ban » duc tan, duc van, duc man
dua ban » dia ban, cua ban, qua ban
su tien » su kien, su hien, tu tieng
hieu ve » hieu va, hieu van
sach v » sach va, sach y, sach 2
ve cam » ve cham, ve cac, va cam
v nang » va nang, vu nang, van nang
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: tu sach v nang x hoi. hieu ve cam ((duc ban) or (dua ban)) hanh vi ((su triet) OR (su tien))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. hieu ve cam ((duc ban) OR (dua ban)) hanh vi ((su triet) OR (su tien))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x hoi. hieu ve cam ((duc ban) or (dua ban)) hanh vi ((su triet) OR (su tien))*".