Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc can chap snippets" » "hoc can chan snippets", "hoc cau chap snippets", "hoc cang chai snippets", "hoc dan chap snippets", "hoc cao chap snippets", "hoc cac chap 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: (((("hoc can chap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hoc can chap snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc can chap snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc can chap snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.