Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
manh toan » thanh toan, anh tuan, tinh toan
doc hieu » toc thieu, hoc thieu, hoc hien
chinh ta » chinh tai, chinh va, chinh tri
toan cau » toan cao, toan ban, toan tap
ta dung » tac dung, tan dung, tao dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - hanh chinh ta dung cong manh toan cau~.
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh chinh ta dung cong manh toan cau*.