Perhaps you should try some spelling variations:
nuoc sach » nguoi sach, hoc sach, cuoc cach
cau thuc » cau truc, cuu thuc, cau phuc
can thuc » dan thuc, van thuc, cay thuc
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
vi cua » vai cua, di cua

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 ky nang xa hoi. hieu va ((cau thuc) OR (can thuc)) va hanh vi cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "nuoc sach ky nang xa hoi. hieu va ((cau thuc) OR (can thuc)) va hanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: nuoc sach ky nang xa hoi. hieu va ((cau thuc) OR (can thuc)) va hanh vi cua tre*.