Perhaps you should try some spelling variations:
chiet tach » chieu sach
nhung cong » thong cong, hang cong, nhung don
hanh dung » thanh dung, anh dung, hanh dong
dung cong » dung trong
dung cua » dung luan, dung cho
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: theo ((chiet tach) or (cuu tinh)) - hanh dung cua ((nhung cong) OR (dung cong)) dan than tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chiet tach) OR (cuu tinh)) - hanh dung cua ((nhung cong) OR (dung cong)) dan than tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chiet tach) or (cuu tinh)) - hanh dung cua ((nhung cong) OR (dung cong)) dan than tap".
• Adding a wildcard symbol may retrieve word variants: theo ((chiet tach) or (cuu tinh)) - hanh dung cua ((nhung cong) OR (dung cong)) dan than tap*.