Perhaps you should try some spelling variations:
cach thuc » anh thuc
dia thanh » gia thanh, da thanh, dinh thanh
thanh vi » hanh vi, thanh va, thanh ve
bo sach » co sach, hoc sach
cua tre » cua te, cuu tre, cua triet
cac thu » cac thoi
hieu va » lieu va, hieu qua
su tien » su kien, su hien, tu tieng
y nang » ky nang, ly nang, v nang
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: bo sach y nang x hoi. hieu va ((cach thuc) OR (cac thu)) dia thanh vi ((cua tre) OR (su tien))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "bo sach y nang x hoi. hieu va ((cach thuc) OR (cac thu)) dia thanh vi ((cua tre) OR (su tien))".
• Adding a wildcard symbol may retrieve word variants: bo sach y nang x hoi. hieu va ((cach thuc) OR (cac thu)) dia thanh vi ((cua tre) OR (su tien))*.