Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets", "python using java slippers"
"keo vung van snippets" » "keo cung van snippets", "ben vung van snippets", "dao vung van snippets", "keo vung va snippets", "keo dung van snippets", "keo vung ven snippets", "keo vung van 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: (((("keo vung van snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("keo vung van snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( keo vung van snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("keo vung van snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.