Perhaps you should try some spelling variations:
quan van » luan van, quan va, quan luan
van hanh » van thanh, ban hanh, van anh
cau theo » cau thi, cau tao
qua van » qua ban, qua san, qua va
tuc van » thuc van, truc van, tuc va
hanh va » hang va, hanh vi
su sac » su sach, su cac, su xac
sac ky » cac ky, sai ky
va cau » van cau, va cac, va dau
x hoi » xa hoi, x ho, 5 hoi
o hoi » co hoi, o hoc, o hai

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 sac ky nang ((x hoi) OR (o hoi)). hieu ((qua van) OR (quan van)) tuc van hanh va cau theo~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sac ky nang ((x hoi) or (o hoi)). hieu ((qua van) OR (quan van)) tuc van hanh va cau theo~".
• Adding a wildcard symbol may retrieve word variants: su sac ky nang ((x hoi) or (o hoi)). hieu ((qua van) OR (quan van)) tuc van hanh va cau theo*.