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