Perhaps you should try some spelling variations:
hieu tinh » chieu tinh, lieu tinh, kieu tinh
canh manh » lanh manh, canh tranh, van manh
dang cong » dung cong
cong tinh » cong trinh, cong vinh, long tinh
cua dang » cua cong, cua ban
toan cau » toan cao, toan ban, toan tap
co hieu » cao hieu, doc hieu

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

• Performing a fuzzy search may retrieve terms with similar spellings: co hieu tinh - ((canh manh) or (cach mang)) cua dang cong tinh toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: co hieu tinh - ((canh manh) OR (cach mang)) cua dang cong tinh toan cau.
• Adding a wildcard symbol may retrieve word variants: co hieu tinh - ((canh manh) or (cach mang)) cua dang cong tinh toan cau*.