Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"khanh van we snippets" » "thanh van we snippets", "khanh vinh we snippets", "hanh va we snippets", "khanh van de snippets", "khanh van le snippets", "khanh can we 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: (((("khanh van we snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("khanh van we snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( khanh van we snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("khanh van we snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.