Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
van cau » van dau, van hau, van chat
xuc van » duc van, luc van, xuc ban
hanh di » hanh vi, hanh de, hang di
y nang » ky nang, ly nang, v nang
di cua » dai cua, doi cua, de cua
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.

• Performing a fuzzy search may retrieve terms with similar spellings: te sach y nang ((x hoi) OR (o hoi)). hieu ((van nam) or (van cau)) xuc van hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang ((x hoi) OR (o hoi)). hieu ((van nam) OR (van cau)) xuc van hanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang ((x hoi) OR (o hoi)). hieu ((van nam) or (van cau)) xuc van hanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach y nang ((x hoi) OR (o hoi)). hieu ((van nam) or (van cau)) xuc van hanh di cua viet*.