Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"python using java snippets" » "python using data snippets"
"chon cac dua snippets" » "cho cac dua snippets", "thong cac dua snippets", "hoc cac dua snippets", "chon cach dua snippets", "chon cac qua snippets", "chon cac du 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: (((("chon cac dua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chon cac dua snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
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• Adding a wildcard symbol may retrieve word variants: (((("chon cac dua snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.