Perhaps you should try some spelling variations:
"using mot cong snippets" » "using mot code snippets", "using both cong snippets", "sung mot cong snippets", "using low cong snippets", "using moi cong snippets", "using hoc cong snippets", "using bo cong snippets"
"locating bug core snippets" » "locating bug code snippets"
"hang java java snippets" » "hang va java 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: (((("using mot cong snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using mot cong snippets") OR ("hang java java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using mot cong snippets ) or ( hang java java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using mot cong snippets") or ("hang java java snippets"))) or ("locating bug core snippets"))*.