Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phung van o snippets" » "phung van do snippets", "phung van ho snippets", "phung van co snippets", "phuong van o snippets", "nhung van o snippets", "chung van o 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: (((("phung van o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phung van o snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phung van o snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phung van o snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.