Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
nam truc » nam truoc, nam thuc, nam trung
thanh vi » hanh vi, thanh va, thanh ve
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
tu sach » thu sach, su sach, te sach
nam tu » nam thu, nam thuc
vi cua » vai cua, di cua
tu sac » tu cac, tu san, tu bac
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: ((tu sac) OR (tu sach)) ky nang x hoi. hieu van ((nam truc) or (nam tu)) van thanh vi cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu sac) OR (tu sach)) ky nang x hoi. hieu van ((nam truc) OR (nam tu)) van thanh vi cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((tu sac) OR (tu sach)) ky nang x hoi. hieu van ((nam truc) or (nam tu)) van thanh vi cua tre".
• Adding a wildcard symbol may retrieve word variants: ((tu sac) OR (tu sach)) ky nang x hoi. hieu van ((nam truc) or (nam tu)) van thanh vi cua tre*.