Perhaps you should try some spelling variations:
su triet » su viet, su tien, ve triet
dua ban » dia ban, cua ban, qua ban
duc ban » duc tan, duc van, duc man
tu sach » thu sach, su sach, te sach
ve cham » va cham, ve chat, vu cham
sach v » sach va, sach y, sach 2
ve cam » ve cac, va cam, ve cai
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
vi su » va su, ve su, ki su

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) OR (ve cham)) ((duc ban) or (dua ban)) hanh vi su triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach v nang x hoi. hieu ((ve cam) OR (ve cham)) ((duc ban) OR (dua ban)) hanh vi su triet*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach v nang x hoi. hieu ((ve cam) OR (ve cham)) ((duc ban) or (dua ban)) hanh vi su triet*".