Perhaps you should try some spelling variations:
"phan using java snippets" » "phan ung java snippets", "phan sinh java snippets", "python using java snippets", "phan using data snippets"
"luong cac he snippets" » "luong cuoc he snippets", "luong va he snippets", "luong tai he 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: (((("luong cac he snippets") or ("phan using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("luong cac he snippets") OR ("phan using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( luong cac he snippets ) or ( phan using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("luong cac he snippets") or ("phan using java snippets"))) or ("locating bug code snippets"))*.