Perhaps you should try some spelling variations:
chiet tach » chieu sach
chieu xanh » chieu sach, chieu sang, chieu tinh
cua thuong » cua truong, cua phuong, ca thuong
lanh dung » anh dung, manh dung, lan dung
dung cua » dung luan, dung cho
cong tap » cuong tap, cong tac, tong tap
cong tan » cong tac, cong san, cong thanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chiet tach) or (chieu xanh)) - lanh dung cua thuong ((cong tap) OR (cong tan)) van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chiet tach) OR (chieu xanh)) - lanh dung cua thuong ((cong tap) OR (cong tan)) van ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chiet tach) or (chieu xanh)) - lanh dung cua thuong ((cong tap) OR (cong tan)) van ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chiet tach) or (chieu xanh)) - lanh dung cua thuong ((cong tap) OR (cong tan)) van ban*.