Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dao den coi snippets" » "dao dan coi snippets", "dan den coi snippets", "day den coi snippets", "dao den voi snippets", "dao den cong 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: (((("dao den coi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dao den coi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dao den coi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dao den coi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.