Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
van thang » van khang, van hang, van than
hieu van » hieu va, thien van, lieu va
lang van » dang van, tang van, hoang van
loi cuu » loi cau, loi luu, loai cua
tu sach » thu sach, su sach, te sach
van cam » van nam, van lam, van cau
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma
cuu tre » cua tre, cau tren, cau treo

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

• Performing a fuzzy search may retrieve terms with similar spellings: tu sach ty ((nang xa) or (lang van)) hoi. hieu van cam xuc ((van thang) OR (van thanh)) loi cuu tre~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach ty ((nang xa) OR (lang van)) hoi. hieu van cam xuc ((van thang) OR (van thanh)) loi cuu tre.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach ty ((nang xa) or (lang van)) hoi. hieu van cam xuc ((van thang) OR (van thanh)) loi cuu tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (lang van)) hoi. hieu van cam xuc ((van thang) OR (van thanh)) loi cuu tre*.