Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phi sang cho snippets" » "phi san cho snippets", "phap sang cho snippets", "khai sang cho snippets", "phi danh cho snippets", "phi dung cho snippets", "phi sang tao 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 sang cho 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 sang cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phi sang cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phi sang cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.