Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
thanh va » thanh van, hanh va, thanh ha
cuu tre » cua tre, cau tren, cau treo
xuc van » duc van, luc van, vuc van
hieu va » lieu va, hieu qua
hieu ve » hieu van
sach ty » sach y, sach tu, sach thu
nang o » nang co, nang ho, nang ro
sac ky » cac ky, sai ky
va cuu » va cau, va chu, va huu
o hoi » co hoi, o hoc, o hai

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) or (sach ty)) nang o hoi. ((hieu ve) or (hieu va)) cam xuc van thanh va cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu ((sac ky) OR (sach ty)) nang o hoi. ((hieu ve) OR (hieu va)) cam xuc van thanh va cuu tre.
• Adding a wildcard symbol may retrieve word variants: tu ((sac ky) or (sach ty)) nang o hoi. ((hieu ve) or (hieu va)) cam xuc van thanh va cuu tre*.