Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham xay con snippets" » "phan xay con snippets", "pham van con snippets", "pham tai con snippets", "pham day con snippets", "pham cay cong snippets", "pham may 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: (((("pham xay con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("pham xay con snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham xay con snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham xay con snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.