Perhaps you should try some spelling variations:
su sach » so sach, vu sach
van hac » van hoc, van ha, van hai
danh ca » dan ca, doanh cua, danh cho
va danh » va dinh, va dan, va hanh
thuc va » thuc vat, thuc dan, thuc day
dan cac » dan cach, dang cac, dan ca
ty nang » ky nang, ty hang, ly nang
cua tre » cua te, cuu tre, cua triet
ca cua » co cua

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: su sach ((ty nang) OR (ty xang)) xa hoi. hieu ((dan cac) OR (van hac)) thuc va danh ca cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su sach ((ty nang) OR (ty xang)) xa hoi. hieu ((dan cac) or (van hac)) thuc va danh ca cua tre~".
• Adding a wildcard symbol may retrieve word variants: su sach ((ty nang) OR (ty xang)) xa hoi. hieu ((dan cac) or (van hac)) thuc va danh ca cua tre*.