Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"trang son da snippets" » "trung son da snippets", "tang son da snippets", "trang con da snippets", "trang song da snippets", "trang son la snippets", "trang son ha 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: (((("trang son da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("trang son da snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( trang son da snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("trang son da snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.