Perhaps you should try some spelling variations:
"dung java java snippets" » "dung va java snippets"
"canh tranh do snippets" » "canh trinh do snippets", "canh thanh do snippets", "canh trang do snippets", "anh tranh do snippets", "can tranh do snippets", "hanh tranh do 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: (((("canh tranh do snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("canh tranh do snippets") OR ("dung java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( canh tranh do snippets ) or ( dung java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("canh tranh do snippets") or ("dung java java snippets"))) or ("locating bug code snippets"))*.