Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"chung vi toi snippets" » "chung cu toi snippets", "chung tu toi snippets", "hung v toi snippets", "chung vi thi snippets", "chung vi tri snippets", "chung di toi 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: (((("chung vi toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("chung vi toi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( chung vi toi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("chung vi toi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.