Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
duc manh » suc manh, duc minh, duc tan
thanh va » thanh van, hanh va, thanh ha
te sach » toc sach
sach ky » sac ky, sach y, sach ty
cuu tre » cua tre, cau tren, cau treo
va cuu » va cau, va chu, va huu
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 ky nang x hoi. hieu van ban ((duc manh) OR (duc anh)) thanh va cuu tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang x hoi. hieu van ban ((duc manh) OR (duc anh)) thanh va cuu tre".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang x hoi. hieu van ban ((duc manh) OR (duc anh)) thanh va cuu tre*.