Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phep dao voi snippets" » "phap dao voi snippets", "phep do voi snippets", "phap day voi snippets", "phep da voi snippets", "phep dao 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: (((("phep dao 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: (((("phep dao voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phep dao voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phep dao voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.