Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong chung co snippets" » "cong chung code snippets", "cong hung co snippets", "cong thuong co snippets", "cong cong co snippets", "cong chung cho snippets", "cong chung cu snippets", "cong chong co snippets"
"hang java java snippets" » "hang va java 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: (((("hang java java snippets") or ("cong chung co snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hang java java snippets") OR ("cong chung co snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hang java java snippets ) or ( cong chung co snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hang java java snippets") or ("cong chung co snippets"))) or ("locating bug core snippets"))*.