Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"cong tai le snippets" » "cong thai le snippets", "cong tac le snippets", "dong tai le snippets", "cong tri le snippets", "cong thi le snippets", "cong tai he snippets"
"locating bug code snippets" » "locating bung code snippets", "locating bugs code snippets", "locating bug core 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: (((("cong tai le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong tai le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( cong tai le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong tai le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.