Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"che tinh doi snippets" » "che kinh doi snippets", "he tinh doi snippets", "cha tinh doi snippets", "che trinh doc snippets", "che trinh do snippets", "che tinh hoc 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: (((("che tinh doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("che tinh doi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( che tinh doi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("che tinh doi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.