Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
quan nhung » qua nhung, cua nhung, luan chung
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, dieu hanh
hanh mang » nhanh mang, hanh trang, nhanh lang
mang quan » nang quan, tang quan, hang quan
cong vang » cong lang, cong quang, cong ngang

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)) - hanh mang quan nhung cong vang ((toan ban) or (van ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu nganh)) - hanh mang quan nhung cong vang ((toan ban) OR (van ban)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) OR (hieu nganh)) - hanh mang quan nhung cong vang ((toan ban) or (van ban))".
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) OR (hieu nganh)) - hanh mang quan nhung cong vang ((toan ban) or (van ban))*.