Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra ma cua snippets" » "tra ha cua snippets", "tra my cua snippets", "tran mai cua snippets", "tra ca cua snippets", "tra manh cua snippets", "tra mang cua 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: (((("tra ma cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tra ma cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra ma cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra ma cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.