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