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