Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"pham gap doi snippets" » "pham giao doi snippets", "pham phap doi snippets", "pham van doi snippets", "pham lap doi snippets", "pham gap do snippets", "pham gap phoi 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 gap doi 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 gap doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( pham gap doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("pham gap doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.