Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thuy van cua snippets" » "thuy san cua snippets", "thuc van cua snippets", "chu van cua snippets", "thuy vang cua snippets", "thuy ban cua snippets", "thuy dan 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: (((("thuy van 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: (((("thuy van cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thuy van cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thuy van cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.