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