Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thai cua » than cua, tai cuc, tri cua
ban hanh » ban hang
hieu van » hieu va, thien van, lieu va
cua tre » cua te, cuu tre, cua triet
van lam » van nam
lam xuc » cam xuc, lam duoc
ky tang » ky nang, ky dang, kho tang
ky lang » ky nang, ky dang, tay lang
su hai » su tai

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

• Performing a fuzzy search may retrieve terms with similar spellings: su hai ((ky lang) OR (ky tang)) xa hoi. hieu van lam xuc ((van thanh) or (ban hanh)) thai cua tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su hai ((ky lang) OR (ky tang)) xa hoi. hieu van lam xuc ((van thanh) OR (ban hanh)) thai cua tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su hai ((ky lang) OR (ky tang)) xa hoi. hieu van lam xuc ((van thanh) or (ban hanh)) thai cua tre".
• Adding a wildcard symbol may retrieve word variants: su hai ((ky lang) OR (ky tang)) xa hoi. hieu van lam xuc ((van thanh) or (ban hanh)) thai cua tre*.