Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"than vo cong snippets" » "than va cong snippets", "than doc cong snippets", "than hoc cong snippets", "than voi cong snippets", "than vao cong snippets", "than vo chong 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: (((("than vo cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("than vo cong snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( than vo cong snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("than vo cong snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.