Perhaps you should try some spelling variations:
nguoi sach » nguoi san
nuoc sach » hoc sach, cuoc cach, cuon sach
van hanh » van thanh, ban hanh, van anh
phuc van » thuc van, phuc va, chuc van
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
nang xa » nang x, lang xa, nang ma
va cau » van cau, va cac, va dau
ve cau » ke cau, ve cac, le cau
di cua » dai cua, doi cua, de cua

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((nuoc sach) or (nguoi sach)) ky nang xa hoi. hieu ((ve cau) OR (va cau)) phuc van hanh di cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (nguoi sach)) ky nang xa hoi. hieu ((ve cau) OR (va cau)) phuc van hanh di cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) or (nguoi sach)) ky nang xa hoi. hieu ((ve cau) OR (va cau)) phuc van hanh di cua tre".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) or (nguoi sach)) ky nang xa hoi. hieu ((ve cau) OR (va cau)) phuc van hanh di cua tre*.