Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hieu xanh » chieu xanh, hieu manh, dieu hanh
canh manh » lanh manh, canh tranh, cach mang
dung cong » dung trong
dang hanh » dang thanh, ban hanh, dang van
manh cua » doanh cua, ban cua
cua dung » cua dang, cua dong, qua dung
dan hanh » dan khanh, dan thanh, ban hanh

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 (hieu nganh)) - canh manh cua dung cong ((dan hanh) OR (dang hanh)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu nganh)) - canh manh cua dung cong ((dan hanh) OR (dang hanh)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (hieu nganh)) - canh manh cua dung cong ((dan hanh) OR (dang hanh)) tap".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu nganh)) - canh manh cua dung cong ((dan hanh) OR (dang hanh)) tap*.