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