Perhaps you should try some spelling variations:
hieu nganh » vien nganh, hiem ngan, hieu manh
hoang thao » hoang thai, hoang hao, hoang thanh
hieu xanh » chieu xanh, hieu manh, dieu hanh
hanh dung » thanh dung, anh dung, hanh dong
luan hang » luan nang, luan han, luan hung
hang cong » dang cong, hang nong, bang cong
cong quan » cuong quan, cong quang, tong quan
hoang cao » hoang bao, hoang hao, nang cao

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