Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dung tin doi snippets" » "dong tin doi snippets", "luong tin doi snippets", "dung tren doi snippets", "dung tinh doi snippets", "dung tin di snippets", "dung tin don 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 tin doi 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 tin doi snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dung tin doi snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dung tin doi snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.