Perhaps you should try some spelling variations:
tcanh tranh » thanh thanh, can tranh, lanh tranh
chiet tach » chieu sach
nhung cong » thong cong, hang cong, nhung don
dung cong » dung trong
ho chiet » ho chieu, ho thiet, hoc thiet
van toan » van tuan, van tan, van thanh
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: ho chiet tach - ((tcanh tranh) or (canh tranh)) va ((nhung cong) OR (dung cong)) van toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho chiet tach - ((tcanh tranh) OR (canh tranh)) va ((nhung cong) OR (dung cong)) van toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho chiet tach - ((tcanh tranh) or (canh tranh)) va ((nhung cong) OR (dung cong)) van toan ban".
• Adding a wildcard symbol may retrieve word variants: ho chiet tach - ((tcanh tranh) or (canh tranh)) va ((nhung cong) OR (dung cong)) van toan ban*.