Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van son cong snippets" » "van song cong snippets", "van bon cong snippets", "van san cong snippets", "van dong cong snippets", "van cong cong snippets", "van sung cong 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: (((("python using java snippets") or ("van son cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("van son cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van son cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van son cong snippets"))) or ("locating bug code snippets"))*.