Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung mat cua snippets" » "duong mat cua snippets", "dung dat cua snippets", "dung may cua snippets", "dung ma cua snippets", "dung manh cua snippets", "dung mang cua 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: (((("dung mat cua snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dung mat cua snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung mat cua snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung mat cua snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.