Perhaps you should try some spelling variations:
chiet tach » chieu sach
tang nguoi » thang nguoi, tang nguon, nang nguoi
tranh cua » doanh cua, manh cua
nguoi dan » nguoi dao, nguoi san, nguong dan
cua tang » cua dang, cua hang, ca tang
dan than » dan chan, ban than, van than
than tap » toan tap, han tap, phan tap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi ((chiet tach) or (chinh sach)) - canh tranh cua tang nguoi dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chiet tach) OR (chinh sach)) - canh tranh cua tang nguoi dan than tap.
• Adding a wildcard symbol may retrieve word variants: doi ((chiet tach) or (chinh sach)) - canh tranh cua tang nguoi dan than tap*.