Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuon sach
dinh cua » dinh cuu, sinh cua, dinh cu
cau thuc » cau truc, cuu thuc, can thuc
ty nang » ky nang, ty xang, ty hang
hieu ve » hieu va, hieu van
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
ve cau » ke cau, va cau, ve cac
va anh » van anh, va danh, va banh
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 (cuoc cach)) ty nang x hoi. hieu ve cau thuc ((va anh) OR (va hanh)) dinh cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((nuoc sach) OR (cuoc cach)) ty nang x hoi. hieu ve cau thuc ((va anh) OR (va hanh)) dinh cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((nuoc sach) or (cuoc cach)) ty nang x hoi. hieu ve cau thuc ((va anh) OR (va hanh)) dinh cua tre".
• Adding a wildcard symbol may retrieve word variants: ((nuoc sach) or (cuoc cach)) ty nang x hoi. hieu ve cau thuc ((va anh) OR (va hanh)) dinh cua tre*.