Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hap hang ca snippets" » "phap khang ca snippets", "phap nang ca snippets", "phap tang ca snippets", "hap hang va snippets", "hap nang cao snippets", "hap hang tai 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: (((("hap hang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hap hang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hap hang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hap hang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.