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