Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cho qua voi snippets" » "cho que voi snippets", "cho sua voi snippets", "cao quan voi snippets", "cho qua loi snippets", "cho dua voi snippets", "cho qua noi 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 qua voi 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 qua voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cho qua voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cho qua voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.