Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phap thuc du snippets" » "phap thu du snippets", "phap hoc du snippets", "phap tu du snippets", "phap truc du snippets", "phap thuc su snippets", "phap thuc tu 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: (((("phap thuc du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap thuc du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phap thuc du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap thuc du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.