Perhaps you should try some spelling variations:
thien van » thi van
su triet » su viet, su tien, ve triet
hanh ve » hanh vi, hanh va, hanh kem
qua ban » cua ban, qua quan
duc ban » duc tan, duc van, dua ban
su sach » so sach
vu sach » vu bach, vu khach
van cac » van hac, van cau, van bac
v nang » va nang, vu nang, van nang
x hoi » xa hoi, o hoi, x ho
ve su » va su

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

• If you are trying to use Boolean operators, they must be ALL CAPS: ((su sach) OR (vu sach)) v nang x hoi. thien van cac ((duc ban) OR (qua ban)) hanh ve su triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((su sach) OR (vu sach)) v nang x hoi. thien van cac ((duc ban) or (qua ban)) hanh ve su triet~".
• Adding a wildcard symbol may retrieve word variants: ((su sach) OR (vu sach)) v nang x hoi. thien van cac ((duc ban) or (qua ban)) hanh ve su triet*.