Perhaps you should try some spelling variations:
"data using java snippets" » "data using data snippets"
"dang tinh doc snippets" » "dang dinh doc snippets", "dang sinh doc snippets", "dang vinh doc snippets", "dang trinh doc snippets", "dang tinh hoc snippets", "dang tinh doi 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 tinh doc snippets") or ("data using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dang tinh doc snippets") OR ("data using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dang tinh doc snippets ) or ( data using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dang tinh doc snippets") or ("data using java snippets"))) or ("locating bug code snippets"))*.