Perhaps you should try some spelling variations:
hieu van » hieu va, thien van, lieu va
dau phuc » cau phuc, dieu phuc, de phuc
van hanh » van thanh, ban hanh, van ban
dieu cua » dieu tra
te sach » toc sach
sach ky » sac ky, sach y, sach ty
nang xa » nang x, lang xa, nang ma
dau khu » dau khi, dau thau, cau khau
van anh » van thanh, tuan anh, van minh
cua tre » cua te, cuu tre, cua triet

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: te sach ky nang xa hoi. hieu van ((dau phuc) OR (dau khu)) ((van hanh) OR (van anh)) dieu cua tre~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "te sach ky nang xa hoi. hieu van ((dau phuc) OR (dau khu)) ((van hanh) or (van anh)) dieu cua tre~".
• Adding a wildcard symbol may retrieve word variants: te sach ky nang xa hoi. hieu van ((dau phuc) OR (dau khu)) ((van hanh) or (van anh)) dieu cua tre*.