Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
cong thanh » dong thanh, cong trinh, truong thanh
hanh tang » hanh trang, anh tang, hanh mang
chu xanh » chu manh, chua xang, chuc danh
cong tan » cong tac, cong san, cong ty
toan cau » toan cao, toan ban, toan tap
tang va » trang va, tang van, thang va

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao ((chu xanh) or (chieu xanh)) - hanh tang va nhung ((cong tan) or (cong thanh)) toan cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao ((chu xanh) OR (chieu xanh)) - hanh tang va nhung ((cong tan) OR (cong thanh)) toan cau.
• Adding a wildcard symbol may retrieve word variants: chao ((chu xanh) or (chieu xanh)) - hanh tang va nhung ((cong tan) or (cong thanh)) toan cau*.