Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"do tren code snippets" » "do tren co snippets", "do tren cong snippets", "do tren com snippets", "dong tren code snippets", "duoc tren code snippets", "do trung code snippets"
"locating bug core snippets" » "locating bug code snippets"

You may be able to get more results by adjusting your search query.

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• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"do tren code snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( do tren code snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("do tren code snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.