Perhaps you should try some spelling variations:
va thanh » gia thanh, ban thanh, va tinh
co sach » bo sach, cuon sach, hoc sach
cam duc » cam xuc, cao duc, pham duc
via cua » gia cua, gian cua, giau cua
va cam » va cham, va cac, va cao
va cua » va chua, ca cua, ma 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: ((co sach) or (hoc sinh)) ky nang x hoi. lieu va cam duc va thanh ((va cua) OR (via cua)) triet~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((co sach) OR (hoc sinh)) ky nang x hoi. lieu va cam duc va thanh ((va cua) OR (via cua)) triet.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((co sach) or (hoc sinh)) ky nang x hoi. lieu va cam duc va thanh ((va cua) OR (via cua)) triet".
• Adding a wildcard symbol may retrieve word variants: ((co sach) or (hoc sinh)) ky nang x hoi. lieu va cam duc va thanh ((va cua) OR (via cua)) triet*.