Perhaps you should try some spelling variations:
"using java code snippets" » "using data code snippets", "using java core snippets"
"trinh coc dat slippers" » "trinh co dat slippers", "trinh doc dat slippers", "trinh cac dat slippers", "trinh hoc dat slippers", "trinh chon dat slippers", "trinh duoc dat slippers", "trinh coc dat slippery", "trinh coc dat 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 ("trinh coc dat slippers"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("using java code snippets") OR ("trinh coc dat slippers"))) OR ("locating bug code snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("using java code snippets") or ("trinh coc dat slippers"))) or ("locating bug code snippets"))*.