Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van cach con snippets" » "va cach con snippets", "van canh con snippets", "vat cach con snippets", "van cach hoan snippets", "van cac cong snippets", "van cac co 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: (((("van cach con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("van cach con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( van cach con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("van cach con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.