Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"phan duc trinh slippers" » "phan duc thinh slippers", "phan doc trinh slippers", "phan qua trinh slippers", "pham duc trinh slippers", "phan tu trinh slippers", "phan dau trinh slippers", "phan duc trinh slippery", "phan duc trinh grippers"
"locating bug code snippets" » "locating bug core snippets", "locating bung code snippets", "locating bugs code snippets"

Try widening your search to All Fields.

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• Performing a fuzzy search may retrieve terms with similar spellings: (((("using java code snippets") or ("phan duc trinh slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("phan duc trinh slippers"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( using java code snippets ) or ( phan duc trinh slippers ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("phan duc trinh slippers"))) or ("locating bug code snippets"))*.