Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hap dan chi snippets" » "hat dan chi snippets", "hai dan chi snippets", "ham dan chi snippets", "hap danh chi snippets", "hap dan thi snippets", "hap van chi 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 dan chi 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 dan chi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hap dan chi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hap dan chi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.