Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"pha van du snippets" » "pha van code snippets", "pham van du snippets", "phan van du snippets", "phap van du snippets", "pha van duy snippets", "pha van dau snippets", "pha 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: (((("pha 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: (((("pha van du snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( pha van du snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pha van du snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.