Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"cong hat cac snippets" » "cong nhat cac snippets", "cong chat cac snippets", "cong ha cac snippets", "cong sat cac snippets", "cong hat ca snippets", "cong hat sac 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: (((("cong hat cac snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong hat cac snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong hat cac snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong hat cac snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.