Perhaps you should try some spelling variations:
"cuon hanh he snippets" » "cuon danh he snippets", "cuong danh he snippets", "cuoc thanh he snippets", "cuon hanh che snippets", "cuon hanh ve snippets", "cuon hanh de snippets"
"dung java java snippets" » "dung va java snippets"
"locating bug code snippets" » "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: (((("cuon hanh he snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cuon hanh he snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cuon hanh he snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cuon hanh he snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.