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