Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tra dau cua snippets" » "tra sau cua snippets", "tra cau cua snippets", "tra du cua snippets", "tra dai cua snippets", "tra day 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 dau 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 dau cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tra dau cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tra dau cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.