Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan van cung snippets" » "tan van cuong snippets", "tan van dung snippets", "tan van hung snippets", "tran van cung snippets", "tang van cung snippets", "luan van cung 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: (((("tan van cung snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tan van cung snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan van cung snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan van cung snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.