Perhaps you should try some spelling variations:
van thanh » ban thanh, van tuan
khau luan » khoa luan, phap luan, pham luan
thanh moi » thanh loi, thanh hoa, thanh hai
dau luan » dan luan, dat luan, dau quang
nang xa » nang x, lang xa, nang ma
hieu va » lieu va, hieu qua
moi cua » hoi cua, doi cua, moi quan
sac ky » sai ky
cua te » cua tu

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

• Performing a fuzzy search may retrieve terms with similar spellings: su ((sac ky) or (cac ky)) nang xa hoi. hieu va ((dau luan) OR (khau luan)) van thanh moi cua te~.
• If you are trying to use Boolean operators, they must be ALL CAPS: su ((sac ky) OR (cac ky)) nang xa hoi. hieu va ((dau luan) OR (khau luan)) van thanh moi cua te.
• The words AND, OR and NOT may confuse the search; try adding quotes: "su ((sac ky) or (cac ky)) nang xa hoi. hieu va ((dau luan) OR (khau luan)) van thanh moi cua te".
• Adding a wildcard symbol may retrieve word variants: su ((sac ky) or (cac ky)) nang xa hoi. hieu va ((dau luan) OR (khau luan)) van thanh moi cua te*.