Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham thu he snippets" » "pham thuc he snippets", "pham thi he snippets", "pham tu he snippets", "pham thu ha snippets", "pham thu xe snippets", "pham thu hien 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: (((("python using java snippets") or ("pham thu he snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("python using java snippets") OR ("pham thu he snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( python using java snippets ) or ( pham thu he snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("python using java snippets") or ("pham thu he snippets"))) or ("locating bug code snippets"))*.