Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tung han lon snippets" » "tung dan lon snippets", "thuong han lon snippets", "tung thanh lon snippets", "tung han tong snippets", "tung hai long snippets", "tung phan lan 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: (((("tung han 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: (((("tung han lon snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tung han lon snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tung han lon snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.