Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tang du doc snippets" » "nang du doc snippets", "hang dau doc snippets", "dang duc doc snippets", "tang duy doc snippets", "tang du hoc snippets", "tang nu doc 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: (((("tang du doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("tang du doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tang du doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tang du doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.