Perhaps you should try some spelling variations:
cua triet » cua viet, su triet, va triet
cam truc » cau truc, lam truoc, nam truoc
van hanh » van thanh, ban hanh, van anh
van tuan » van quan, van ban, anh tuan
nam truc » nam truoc, nam thuc, nam trung
hanh de » hanh ve, hanh kem
vu sach » vu bach, vu khach
su sach » so sach
hieu ve » hieu va, hieu van
tuan x » tuan q, huan x
de cua » le cua, te cua, dieu cua
x hoi » xa hoi, o hoi, x ho

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: ((vu sach) OR (su sach)) van tuan x hoi. hieu ve ((cam truc) OR (nam truc)) van hanh de cua triet~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) OR (su sach)) van tuan x hoi. hieu ve ((cam truc) or (nam truc)) van hanh de cua triet~".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) OR (su sach)) van tuan x hoi. hieu ve ((cam truc) or (nam truc)) van hanh de cua triet*.