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