Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
van hanh » van thanh, ban hanh, van anh
xuc van » duc van, luc van, vuc van
vu sach » vu bach, su sach, vu khach
ty nang » ky nang, ty hang, ly nang
ve cam » ve cham, ve cac, ve cai
va cam » va cham, va cac, va cao
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: vu sach ((ty nang) OR (ty xang)) x hoi. hieu ((ve cam) or (va cam)) xuc van hanh vi cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: vu sach ((ty nang) OR (ty xang)) x hoi. hieu ((ve cam) OR (va cam)) xuc van hanh vi cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "vu sach ((ty nang) OR (ty xang)) x hoi. hieu ((ve cam) or (va cam)) xuc van hanh vi cua viet".
• Adding a wildcard symbol may retrieve word variants: vu sach ((ty nang) OR (ty xang)) x hoi. hieu ((ve cam) or (va cam)) xuc van hanh vi cua viet*.