Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cua he trinh slippers" » "cua he tinh slippers", "cua thi trinh slippers", "cua tho trinh slippers", "cua che trinh slippers", "cua te trinh slippers", "cua le trinh slippers", "cua he trinh slippery", "cua he trinh grippers"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core snippets"

Try widening your search to All Fields.

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