Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cac vung cho snippets" » "cac ung cho snippets", "cac chung cho snippets", "cach dung cho snippets", "cac dung cho snippets", "cac rung cho snippets", "cac vung co 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: (((("cac vung 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: (((("cac vung cho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cac vung cho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cac vung cho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.