Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"tim hieu voi snippets" » "tim hieu moi snippets", "tim lieu voi snippets", "tim hieu loi snippets", "time hieu voi 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: (((("tim hieu 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: (((("tim hieu voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( tim hieu voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("tim hieu voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.