Perhaps you should try some spelling variations:
"locating bugs code snippets" » "locating bug code snippets", "locating bugs code slippers"
"data using java snippets" » "data using data snippets", "data using java slippers"
"dung luan thi snippets" » "dung luan chi snippets", "dung luan thiet snippets", "dung luyen thi snippets", "dung luan thi slippers"

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: (((("data using java snippets") or ("dung luan thi snippets"))) or ("locating bugs code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("data using java snippets") OR ("dung luan thi snippets"))) OR ("locating bugs code snippets")).
• Removing quotes may allow a broader search: (((( data using java snippets ) or ( dung luan thi snippets ))) or ( locating bugs code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("data using java snippets") or ("dung luan thi snippets"))) or ("locating bugs code snippets"))*.