Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con trung du snippets" » "chon truong du snippets", "doan trung du snippets", "dong trung du snippets", "con truong du snippets", "con trung vu snippets", "con trung dung 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: (((("con trung du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("con trung du snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con trung du snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con trung du snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.