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