Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phoi dung he snippets" » "hoi dung he snippets", "hoc dung he snippets", "noi dung he snippets", "phoi dung cho 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: (((("phoi dung he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phoi dung he snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phoi dung he snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phoi dung he snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.