Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"hieu voi so snippets" » "hieu moi so snippets", "lieu voi so snippets", "hieu loi so snippets", "hieu noi so snippets", "hieu voi ho snippets", "hieu hoi so 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: (((("hieu voi so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hieu voi so snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( hieu voi so snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hieu voi so snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.