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