Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"van pham voi snippets" » "san pham voi snippets", "van phan voi snippets", "van phat voi snippets", "van pham vi snippets", "van cham voi snippets", "van pham doi snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("python using java snippets") or ("van pham voi snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("van pham voi snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( van pham voi snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("van pham voi snippets"))) or ("locating bug code snippets"))*.