Perhaps you should try some spelling variations:
nguoi sach » nguoi san
nuoc sach » hoc sach, cuoc cach, cuon sach
phuc van » phuc va, chuc van, khuc van
thuc van » thuc vat, thuc dan, thuc va
hieu ve » hieu va, hieu van
cuu tre » cua tre, cau tren, cau treo
ve cau » ke cau, va cau, ve cac
vi cuu » vi luu, vinh cuu
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: ((nuoc sach) OR (nguoi sach)) ky nang x hoi. hieu ve cau ((phuc van) or (thuc van)) hanh vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (nguoi sach)) ky nang x hoi. hieu ve cau ((phuc van) OR (thuc van)) hanh vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) OR (nguoi sach)) ky nang x hoi. hieu ve cau ((phuc van) or (thuc van)) hanh vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) OR (nguoi sach)) ky nang x hoi. hieu ve cau ((phuc van) or (thuc van)) hanh vi cuu tre*.