Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
canh trinh » hanh trinh, canh tinh, anh trinh
nhung cong » dung cong, thong cong, hang cong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
tien anh » tieng anh, tien manh, dien anh
toan cau » toan cao, toan ban, toan tap

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 (tien anh)) - ((canh trinh) OR (canh tranh)) va nhung cong manh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: toc ((thieu xanh) OR (tien anh)) - ((canh trinh) OR (canh tranh)) va nhung cong manh toan cau.
• The words AND, OR and NOT may confuse the search; try adding quotes: "toc ((thieu xanh) or (tien anh)) - ((canh trinh) OR (canh tranh)) va nhung cong manh toan cau".
• Adding a wildcard symbol may retrieve word variants: toc ((thieu xanh) or (tien anh)) - ((canh trinh) OR (canh tranh)) va nhung cong manh toan cau*.