Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets"
"don than hoc snippets" » "don thuan hoc snippets", "dan than hoc snippets", "con than hoc snippets", "don toan hoc snippets", "don thai hoc snippets", "don than doc snippets"
"locating bug core snippets" » "locating bug 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 code snippets") or ("don than hoc snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("don than hoc snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( don than hoc snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("don than hoc snippets"))) or ("locating bug core snippets"))*.