Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"dau tich can snippets" » "dau tinh can snippets", "di tich can snippets", "su tich can snippets", "dau tich cac snippets", "dau tich van snippets", "dau dich can 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: (((("dau tich can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("dau tich can snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( dau tich can snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("dau tich can snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.