Perhaps you should try some spelling variations:
"tre thanh java snippets" » "tre thanh va snippets", "tre trinh java snippets", "tre think java snippets", "te thanh java snippets", "tra thanh java snippets", "trien thanh java snippets"
"python using c snippets" » "python using lc snippets", "python using a snippets", "python using _ 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: (((("python using c snippets") or ("tre thanh java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using c snippets") OR ("tre thanh java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using c snippets ) or ( tre thanh java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using c snippets") or ("tre thanh java snippets"))) or ("locating bug code snippets"))*.