Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu manh, hieu nganh
chinh han » chinh phan, chin han, chinh ban
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
doc hieu » toc thieu, hoc thieu, hoc hien
han dung » chan dung, han duong, hanh dung
toan tai » toan tap, doanh tai, toan cao
toan ban » van ban

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 han dung cong manh ((toan tai) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - hanh chinh han dung cong manh ((toan tai) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh chinh han dung cong manh ((toan tai) or (toan ban))*.