Perhaps you should try some spelling variations:
hieu manh » chieu xanh, hieu nganh, hien hanh
hieu xanh » chieu xanh, hieu nganh, hien hanh
canh minh » canh tinh, canh binh, chinh minh
anh quang » anh xquang, anh quan, nhanh quang
quang cao » nang cao, quang nam
dung anh » dung danh, duong anh, dong anh
minh va » tinh va, sinh va, sinh vat
ung » cung
dung » dcung

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