Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"toan xac cong snippets" » "toan ban cong snippets", "toan hoc cong snippets", "toan tap cong snippets", "toan cac cong snippets", "toan xuat cong snippets", "toan tai cong snippets"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code 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: (((("using java code snippets") or ("toan xac cong snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("toan xac cong snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( toan xac cong snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("toan xac cong snippets"))) or ("locating bug code snippets"))*.