Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets", "data using java slippers"
"huong dan trac snippets" » "huong dan tra snippets", "huong dang tran snippets", "huong dien trac snippets", "huong dan trac slippers"
"locating bug code snippets" » "locating bug code slippers", "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: (((("huong dan trac snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("huong dan trac snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( huong dan trac snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("huong dan trac snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.