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