Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"thi chien do snippets" » "thi hien do snippets", "thi thien do snippets", "thien chien do snippets", "thi chien dong snippets", "thi chien dau snippets", "thi chuyen do 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: (((("thi chien do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("thi chien do snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( thi chien do snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("thi chien do snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.