Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
va hanh » van hanh, va thanh, ban hanh
va danh » va dinh, va dan, dia danh
sach ty » sach y, sach tu, sach thu
hieu ve » hieu va, hieu van
ty nang » ky nang, ty xang, ty hang
cuu tre » cua tre, cau tren, cau treo
ve cau » ke cau, va cau, ve cac
vi cuu » vi luu, vinh cuu
o hoi » co hoi, o hoc, o hai
x hoi » xa hoi, x ho, 5 hoi

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 ty nang ((x hoi) OR (o hoi)). hieu ve cau truc ((va danh) or (va hanh)) vi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: nuoc sach ty nang ((x hoi) OR (o hoi)). hieu ve cau truc ((va danh) OR (va hanh)) vi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ty nang ((x hoi) OR (o hoi)). hieu ve cau truc ((va danh) or (va hanh)) vi cuu tre".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ty nang ((x hoi) OR (o hoi)). hieu ve cau truc ((va danh) or (va hanh)) vi cuu tre*.