Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"vat chat cua snippets" » "van chat cua snippets", "va chat cua snippets", "cao chat cua snippets", "vat nhat cua snippets", "vat chat va snippets", "vat chat huu 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: (((("vat chat 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: (((("vat chat cua snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( vat chat cua snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("vat chat cua snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.