Perhaps you should try some spelling variations:
van thang » van thanh, van khang, van hang
lang van » dang van, tang van, hoang van
hieu van » hieu va, thien van, lieu va
tu sach » thu sach, su sach, te sach
cam duc » cam xuc, cao duc, pham duc
loi cau » loi ca, hoi cau, loi can
loi cuu » loi luu, loai cua, loi chuc
duc van » duc va, duc tan, duc manh
van cam » van nam, van lam, van cau
sach ty » sach y, sach tu, sach thu
nang xa » nang x, lang xa, nang ma

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 duc van thang ((loi cuu) OR (loi cau)) 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 duc van thang ((loi cuu) OR (loi cau)) 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 duc van thang ((loi cuu) OR (loi cau)) tre".
• Adding a wildcard symbol may retrieve word variants: tu sach ty ((nang xa) or (lang van)) hoi. hieu van cam duc van thang ((loi cuu) OR (loi cau)) tre*.