Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi giac do snippets" » "phi gia do snippets", "khi giao do snippets", "khi gia do snippets", "phi giac mo snippets", "phi giac duoc 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: (((("phi giac do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phi giac do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi giac do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi giac do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.