Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
tinh cua » trinh cua, tinh chat, tranh cua
sinh cua » manh cua, dinh cuu, sinh va
cong dan » cong san, cong tan, huong dan
dan toan » van toan, dan than, manh toan
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: cao hieu xanh - thanh ((tinh cua) or (sinh cua)) nhung cong dan toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: cao hieu xanh - thanh ((tinh cua) OR (sinh cua)) nhung cong dan toan cau.
• Adding a wildcard symbol may retrieve word variants: cao hieu xanh - thanh ((tinh cua) or (sinh cua)) nhung cong dan toan cau*.