Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van anh
te sach » toc sach
van dau » van dao, phan dau
xuc van » duc van, luc van, vuc van
doi cua » dai cua, hoi cua
y nang » ky nang, ly nang, v nang
di cua » dai cua, de cua, do cua
x hoi » xa hoi, o hoi, x ho

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