Perhaps you should try some spelling variations:
thong cong » trong cong, tong cong, thong thong
nhung cong » dung cong, hang cong, nhung don
hieu lang » chieu sang, hieu quang, nhieu tang
canh manh » canh tranh, cach mang, van manh
lanh manh » lanh tranh, lan anh, van manh
danh phan » doanh phan, danh nhan, danh phap
doi hieu » doi chieu, doc hieu, doi hien

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi hieu lang - ((canh manh) or (lanh manh)) cua ((nhung cong) OR (thong cong)) danh phan tu~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi hieu lang - ((canh manh) OR (lanh manh)) cua ((nhung cong) OR (thong cong)) danh phan tu.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi hieu lang - ((canh manh) or (lanh manh)) cua ((nhung cong) OR (thong cong)) danh phan tu".
• Adding a wildcard symbol may retrieve word variants: doi hieu lang - ((canh manh) or (lanh manh)) cua ((nhung cong) OR (thong cong)) danh phan tu*.