Perhaps you should try some spelling variations:
ban thanh » ban hanh
hieu van » hieu va, thien van, lieu va
ban hang » ngan hang
ky lang » ky dang, ky tang, tay lang
van cam » van nam, van lam, van cau
cua tre » cua te, cuu tre, cua triet
tu sac » tu sach, tu cac, tu san
de cua » le cua, te cua, dieu cua

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 ((ky lang) or (ky nang)) xa hoi. hieu van cam xuc ((ban thanh) OR (ban hang)) de cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sac ((ky lang) OR (ky nang)) xa hoi. hieu van cam xuc ((ban thanh) OR (ban hang)) de cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sac ((ky lang) or (ky nang)) xa hoi. hieu van cam xuc ((ban thanh) OR (ban hang)) de cua tre".
• Adding a wildcard symbol may retrieve word variants: tu sac ((ky lang) or (ky nang)) xa hoi. hieu van cam xuc ((ban thanh) OR (ban hang)) de cua tre*.