Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"cong sua ke snippets" » "cong suat ke snippets", "cong cua ke snippets", "cong suc ke snippets", "cong bua ke snippets", "cong sua me snippets", "cong suat keo 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 ("cong sua ke snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("cong sua ke snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( cong sua ke snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("cong sua ke snippets"))) or ("locating bug code snippets"))*.