Perhaps you should try some spelling variations:
ban thanh » ban hanh, ban hang
cau tren » cu tren, dau tren, ca tren
thanh di » thanh doi, thanh de, thanh do
hieu van » hieu va, thien van, lieu va
xuc ban » duc ban, cuc ban, quoc ban
van cam » van nam, van lam, van cau
ky dang » ky nang, ky danh
ky tang » ky nang, kho tang, ky trong
tu ban » thu ban, te ban
di cau » da cau, diem cau
tu san » thu san, tu can, vu san

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 ban)) ((ky tang) or (ky dang)) xa hoi. hieu van cam xuc ban thanh di cau tren~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((tu san) OR (tu ban)) ((ky tang) OR (ky dang)) xa hoi. hieu van cam xuc ban thanh di cau tren.
• Adding a wildcard symbol may retrieve word variants: ((tu san) or (tu ban)) ((ky tang) or (ky dang)) xa hoi. hieu van cam xuc ban thanh di cau tren*.