Perhaps you should try some spelling variations:
tu sach » thu sach, su sach, te sach
hieu ve » hieu van
hieu va » lieu va, hieu qua
cau tuc » cau truc, cau tu, cau luc
va hanh » van hanh, va thanh, va danh
cua tre » cua te, cuu tre, cua triet
y nang » ly nang, v nang, may nang
tuc va » thuc va, truc va, tuc xa
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: tu sach ((y nang) or (ky nang)) xa hoi. ((hieu ve) or (hieu va)) cau tuc va hanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ((y nang) OR (ky nang)) xa hoi. ((hieu ve) OR (hieu va)) cau tuc va hanh vi cua tre.
• Adding a wildcard symbol may retrieve word variants: tu sach ((y nang) or (ky nang)) xa hoi. ((hieu ve) or (hieu va)) cau tuc va hanh vi cua tre*.