Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tan van di snippets" » "tran van di snippets", "tang van di snippets", "luan van di snippets", "tan van dip snippets", "tan van dai snippets", "tan van doi 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 di 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 di snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tan van di snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tan van di snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.