Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chap hanh so snippets" » "nhat hanh so snippets", "phap han so snippets", "pham hanh so snippets", "chap anh so snippets", "chap hanh mo snippets", "chap hanh su 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: (((("chap hanh so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chap hanh so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chap hanh so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chap hanh so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.