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 sanh » tu hanh, tu manh, tu anh
nam tu » nam thu, nam thuc
vi cua » vai cua, di cua
tu san » thu san, tu ban, tu can
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 san) or (tu sanh)) 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 san) OR (tu sanh)) 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 san) or (tu sanh)) ky nang x hoi. hieu van ((nam truc) or (nam tu)) van thanh vi cua tre*.