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