Perhaps you should try some spelling variations:
"dang java java snippets" » "dang va java snippets"
"thong van hoe snippets" » "trong van hoe snippets", "thong va hoe snippets", "thong quan hoe snippets", "thong van hoa snippets", "thong van hoc snippets", "thong van hieu 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: (((("dang java java snippets") or ("thong van hoe snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang java java snippets") OR ("thong van hoe snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang java java snippets ) or ( thong van hoe snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang java java snippets") or ("thong van hoe snippets"))) or ("locating bug code snippets"))*.