Perhaps you should try some spelling variations:
canh thanh » canh tranh, anh thanh, nhanh thanh
danh thanh » dinh thanh, dang thanh, nhanh thanh
thong cong » trong cong, tong cong, thong thong
cong thanh » dong thanh, cong trinh, cong tan
thanh phan » thanh pho, thanh san, thanh toan
doi chieu » doc hieu, doi chi, ho chieu
va thong » va thuong, va phuong, he thong
phan dau » phan tu, hang dau

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

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