Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho cong que snippets" » "cao cong que snippets", "cua cong que snippets", "cac cong que snippets", "cho cong quy snippets", "cho thong que snippets", "cho huong que 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: (((("cho cong que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cho cong que snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho cong que snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho cong que snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.