Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phen hang ca snippets" » "phen dang ca snippets", "pham hang ca snippets", "chen wang ca snippets", "phen hang va snippets", "phen nang cao snippets", "phen hang tai 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: (((("phen hang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phen hang ca snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phen hang ca snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phen hang ca snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.