Perhaps you should try some spelling variations:
vu sach » vu bach, su sach, vu khach
te sach » toc sach
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
via cua » gia cua, gian cua, giau cua
va cam » va cham, va cac, va cao
xuc va » duc va, tuc va, luc va
va cua » va chua, ca cua, ma cua

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 (te sach)) ky nang xa hoi. hieu va cam xuc va hanh ((va cua) OR (via cua)) tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((vu sach) OR (te sach)) ky nang xa hoi. hieu va cam xuc va hanh ((va cua) OR (via cua)) tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((vu sach) or (te sach)) ky nang xa hoi. hieu va cam xuc va hanh ((va cua) OR (via cua)) tre".
• Adding a wildcard symbol may retrieve word variants: ((vu sach) or (te sach)) ky nang xa hoi. hieu va cam xuc va hanh ((va cua) OR (via cua)) tre*.