Perhaps you should try some spelling variations:
"hang java java snippets" » "hang va java snippets"
"dang may cong snippets" » "mang may cong snippets", "dang xay cong snippets", "dung may cong snippets", "dang cay cong snippets", "dang cac cong snippets", "dang cao cong 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 may cong snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang may cong snippets") OR ("hang java java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang may cong snippets ) or ( hang java java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang may cong snippets") or ("hang java java snippets"))) or ("locating bug code snippets"))*.