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