Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hoc kham du snippets" » "goc kham du snippets", "hoc khac du snippets", "hoc nham du snippets", "hoc kham da snippets", "hoc tham du snippets", "hoc pham duc 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 kham 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: (((("hoc kham du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hoc kham du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hoc kham du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.