Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"cong dan cach snippets" » "cong san cach snippets", "cong tan cach snippets", "huong dan cach snippets", "cong dan cac snippets", "cong dan canh snippets", "cong nhan cach 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 dan cach 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 dan cach snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong dan cach snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong dan cach snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.