Perhaps you should try some spelling variations:
"using java core snippets" » "using data core snippets"
"trong he co snippets" » "trong che co snippets", "trong hue co snippets", "trong le co snippets", "trong de co snippets", "trong ke co snippets", "trong ve co snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets"

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 core snippets") or ("trong he co snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java core snippets") OR ("trong he co snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java core snippets ) or ( trong he co snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java core snippets") or ("trong he co snippets"))) or ("locating bug code snippets"))*.