Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
phuc van » phuc va, chuc van, khuc van
thuc van » thuc vat, thuc dan, thuc va
cau treo » cau theo, cau tren, cau triet
hieu ve » hieu va, hieu van
cua tre » cua te, cuu tre, cua triet
y nang » ky nang, ly nang, v nang
ve cau » ke cau, va cau, ve cac
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 y nang x hoi. hieu ve cau ((phuc van) or (thuc van)) hanh vi ((cua tre) or (cau treo))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach y nang x hoi. hieu ve cau ((phuc van) OR (thuc van)) hanh vi ((cua tre) OR (cau treo)).
• Adding a wildcard symbol may retrieve word variants: nuoc sach y nang x hoi. hieu ve cau ((phuc van) or (thuc van)) hanh vi ((cua tre) or (cau treo))*.