Perhaps you should try some spelling variations:
cua viet » ca viet, hoa viet, cua vat
van cam » van lam, van cau, van dam
lv nang » ly nang
va hanh » van hanh, va thanh, va danh
hanh di » hanh vi, hanh de, hang di
te sach » toc sach
v nang » va nang, vu nang, van nang
xuc va » duc va, tuc va, luc va
di cua » dai cua, doi cua, de 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 (lv nang)) x hoi. hieu ((van cam) OR (van nam)) xuc va hanh di cua viet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ((v nang) OR (lv nang)) x hoi. hieu ((van cam) OR (van nam)) xuc va hanh di cua viet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ((v nang) or (lv nang)) x hoi. hieu ((van cam) OR (van nam)) xuc va hanh di cua viet".
• Adding a wildcard symbol may retrieve word variants: te sach ((v nang) or (lv nang)) x hoi. hieu ((van cam) OR (van nam)) xuc va hanh di cua viet*.