Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"duong ve soi snippets" » "duong va soi snippets", "duong vien soi snippets", "duong van soi snippets", "duong ve moi snippets", "duong ve doi snippets", "duong ve so 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: (((("duong ve soi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("duong ve soi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( duong ve soi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("duong ve soi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.