Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dung van moi snippets" » "duong van moi snippets", "dung va moi snippets", "dang van moi snippets", "dung van muoi snippets", "dung van loi snippets", "dung ban moi 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: (((("dung van moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung van moi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung van moi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung van moi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.