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