Perhaps you should try some spelling variations:
thieu xanh » hieu manh, thien anh, thien danh
chieu xanh » chieu sach, chieu sang, chieu tinh
thong cong » trong cong, tong cong, thong thong
tranh van » tran van, trinh van, thanh van
dang cong » dung cong
van thanh » ban thanh, van tuan
thanh tai » thanh hai, thanh toan, doanh tai

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

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