Perhaps you should try some spelling variations:
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
canh manh » lanh manh, canh tranh, cach mang
anh quang » anh xquang, anh quan, nhanh quang
quang cao » nang cao, quang nam
dung anh » dung danh, duong anh, dong anh
manh va » hanh va, anh va, minh va
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 (hieu manh)) - canh manh va ung dung anh quang cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - canh manh va ung dung anh quang cao.
• Adding a wildcard symbol may retrieve word variants: doc ((hieu xanh) or (hieu manh)) - canh manh va ung dung anh quang cao*.