Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"so duong ho snippets" » "soi duong ho snippets", "soc duong ho snippets", "son duong ho snippets", "so duong hoi snippets", "so duong hoc snippets", "so duong hoa 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: (((("so duong ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("so duong ho snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( so duong ho snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("so duong ho snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.