Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi luan lon snippets" » "thi lan lon snippets", "thi xuan lon snippets", "thi loan lon snippets", "thi luan von snippets", "thi luan len snippets", "thi luan luong 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: (((("thi luan lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi luan lon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi luan lon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi luan lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.