Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong hai he snippets" » "cong thai he snippets", "cong ha he snippets", "hoang hai he snippets", "cong tai he snippets", "cong hai le snippets", "cong kai he 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 hai he 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 hai he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong hai he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong hai he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.