Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"con tuong le snippets" » "con truong le snippets", "con duong le snippets", "con cuong le snippets", "con thuong le snippets", "con tuong len snippets", "con trong le 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 tuong 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: (((("con tuong le snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( con tuong le snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("con tuong le snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.