Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"van hoang o2 snippets" » "van hoang code snippets", "van hoan o2 snippets", "quan hoang o2 snippets", "tran hoang o2 snippets", "van hang o2 snippets", "van hoang o snippets", "van hoang son snippets"
"python using java snippets" » "python using data snippets"

Try widening your search to All Fields.

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