Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tri ban toan snippets" » "tri bai toan snippets", "tri ban than snippets", "tri van toan snippets", "tai ban toan snippets", "tri benh toan 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: (((("tri ban toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tri ban toan snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tri ban toan snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tri ban toan snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.