Perhaps you should try some spelling variations:
nhung cong » thong cong, hang cong, nhung don
hanh tranh » hanh trinh, hanh trang, lanh tranh
dang thanh » dong thanh, dang hanh, hoang thanh
dung cong » dung trong
thanh tap » thanh lap, thanh tai, thanh tay
theo chu » theo chieu, cho chu, chao chu
chu nang » chuc nang, chua nang, cuu nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chu nang - ((hanh tranh) OR (canh tranh)) cua ((nhung cong) or (dung cong)) dang thanh tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chu nang - ((hanh tranh) OR (canh tranh)) cua ((nhung cong) OR (dung cong)) dang thanh tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo chu nang - ((hanh tranh) OR (canh tranh)) cua ((nhung cong) or (dung cong)) dang thanh tap".
• Adding a wildcard symbol may retrieve word variants: theo chu nang - ((hanh tranh) OR (canh tranh)) cua ((nhung cong) or (dung cong)) dang thanh tap*.