Perhaps you should try some spelling variations:
vu khanh » vu thanh, van khanh, duy khanh
vu sach » vu bach, su sach, vu khach
va hanh » van hanh, va thanh, va danh
cuu tre » cua tre, cau tren, cau treo
va cam » va cham, va cao, va cai
xuc va » duc va, tuc va, luc va
vi cuu » vi luu, vinh cuu
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) or (vu khanh)) ky nang x hoi. hieu ((va cam) OR (va cac)) xuc va hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (vu khanh)) ky nang x hoi. hieu ((va cam) OR (va cac)) xuc va hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (vu khanh)) ky nang x hoi. hieu ((va cam) OR (va cac)) xuc va hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (vu khanh)) ky nang x hoi. hieu ((va cam) OR (va cac)) xuc va hanh vi cuu tre*.