Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hanh trinh » canh tranh, hanh chinh
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, hien hanh
trinh cua » tinh cua, trinh luat, trinh quan
cua nhung » va nhung
cong dan » cong san, cong tan, huong dan
dan van » dang van, doan van, dao van

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) or (dieu hanh))) or (hieu nganh)) - hanh trinh cua nhung cong dan van ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((((hieu xanh) OR (dieu hanh))) OR (hieu nganh)) - hanh trinh cua nhung cong dan van ban.
• Adding a wildcard symbol may retrieve word variants: doc ((((hieu xanh) or (dieu hanh))) or (hieu nganh)) - hanh trinh cua nhung cong dan van ban*.