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