Perhaps you should try some spelling variations:
van nang » van quang, van ban, van dong
van hanh » van thanh, ban hanh, van anh
cua viet » ca viet, hoa viet, cua vat
te sach » toc sach
van hau » van ha, van hai, van dau
xuc van » duc van, luc van, vuc van
v nang » va nang, vu nang, voi nang
vi cua » vai cua, di 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 ((v nang) OR (van nang)) x hoi. hieu ((van nam) or (van hau)) xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (van nang)) x hoi. hieu ((van nam) OR (van hau)) xuc van hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) OR (van nang)) x hoi. hieu ((van nam) or (van hau)) xuc van hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) OR (van nang)) x hoi. hieu ((van nam) or (van hau)) xuc van hanh vi cua viet*.