Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"nhung 15 tan snippets" » "nhung bi tan snippets", "nhung gi tan snippets", "nhung bo tan snippets", "nhung 1 tan snippets", "nhung 5 tan snippets", "nhung 1500 tan snippets"

Try widening your search to All Fields.

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

• Performing a fuzzy search may retrieve terms with similar spellings: (((("nhung 15 tan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nhung 15 tan snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("nhung 15 tan snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.