Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pha van voi snippets" » "pham van voi snippets", "phan van voi snippets", "phap van voi snippets", "pha van loi snippets", "pha van noi snippets", "pha van von 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: (((("pha van 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: (((("pha van voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pha van voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pha van voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.