Perhaps you should try some spelling variations:
phan thanh » pham thanh, ban thanh, van thanh
chieu sach » chinh sach, chiet tach, chieu sang
thong tinh » thuong tinh, thong tin, thong minh
hieu manh » chieu xanh, hieu nganh, dieu hanh
thanh van » thanh san, thanh toan, thanh phan
van thong » van thuong, van phong, va thong
tinh van » trinh van, dinh van, tinh va

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((chieu sach) or (hieu manh)) - phan thanh van thong thong tinh van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((chieu sach) OR (hieu manh)) - phan thanh van thong thong tinh van ban.
• Adding a wildcard symbol may retrieve word variants: doc ((chieu sach) or (hieu manh)) - phan thanh van thong thong tinh van ban*.