Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"phap van du snippets" » "phap van code snippets", "pham van du snippets", "phan van du snippets", "phap han du snippets", "phap van duy snippets", "phap van dau snippets", "phap van de 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: (((("phap van du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phap van du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( phap van du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phap van du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.