Perhaps you should try some spelling variations:
"duong anh han snippets" » "duong manh han snippets", "duong xanh han snippets", "duong vanh han snippets", "duong anh nhan snippets", "duong anh phan snippets", "duong hanh han snippets", "duong anh han slippers"
"dung java java snippets" » "dung va java snippets", "dung java java slippers"
"locating bug code snippets" » "locating bug code slippers", "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("duong anh han snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong anh han snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong anh han snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong anh han snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.