Perhaps you should try some spelling variations:
"phan than java snippets" » "phan thanh java snippets", "phan tan java snippets", "khan than java snippets", "phan think java snippets", "phan than va snippets"
"using a core snippets" » "using _ core snippets", "using a care snippets", "using a corn snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code 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: (((("using a core snippets") or ("phan than java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using a core snippets") OR ("phan than java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using a core snippets ) or ( phan than java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using a core snippets") or ("phan than java snippets"))) or ("locating bug code snippets"))*.