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