Perhaps you should try some spelling variations:
nguoi sach » nguoi san, nuoc sach
phuc van » thuc van, phuc va, khuc van
chuc van » chu van, chuc va, thuc van
hieu ve » hieu va, hieu van
hanh di » hanh vi, hanh de, hang di
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
di cua » dai cua, doi cua, de cua
x hoi » xa hoi, o hoi, x ho
cuoc » quoc, duoc

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

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