Perhaps you should try some spelling variations:
van hanh » van thanh, ban hanh, van ban
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cua triet, dua tren
te sach » toc sach
chu duc » thu duc, chua duoc, cuu duoc
hieu ve » hieu va, hieu van
cuu tre » cau tren, cau treo
y nang » ky nang, ly nang, v nang
ve chu » ve cau, va chu, ve che
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: te sach y nang x hoi. hieu ve chu duc ((van hanh) OR (van anh)) kem ((cua tre) or (cuu tre))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: te sach y nang x hoi. hieu ve chu duc ((van hanh) OR (van anh)) kem ((cua tre) OR (cuu tre)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach y nang x hoi. hieu ve chu duc ((van hanh) OR (van anh)) kem ((cua tre) or (cuu tre))".
• Adding a wildcard symbol may retrieve word variants: te sach y nang x hoi. hieu ve chu duc ((van hanh) OR (van anh)) kem ((cua tre) or (cuu tre))*.