Perhaps you should try some spelling variations:
luan phan » luan van, luan hoan
lang van » dang van, tang van, hoang van
hieu van » hieu va, thien van, lieu va
van phan » van phong, van thanh, van ban
tu sach » thu sach, su sach, te sach
nang xa » nang x, lang xa, nang ma
van cau » van dau, van hau, van chat
cau duc » cao duc, cau luc, chu duc
cuc tu » cuc du, luc tu, duc tu

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 y ((nang xa) or (lang van)) hoi. hieu van cau duc ((van phan) OR (luan phan)) tai cuc tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: tu sach y ((nang xa) OR (lang van)) hoi. hieu van cau duc ((van phan) OR (luan phan)) tai cuc tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "tu sach y ((nang xa) or (lang van)) hoi. hieu van cau duc ((van phan) OR (luan phan)) tai cuc tu".
• Adding a wildcard symbol may retrieve word variants: tu sach y ((nang xa) or (lang van)) hoi. hieu van cau duc ((van phan) OR (luan phan)) tai cuc tu*.