Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nang du doc snippets" » "nang tu doc snippets", "nang luc doc snippets", "nang doc doc snippets", "nang duy doc snippets", "nang du hoc snippets", "nang nu doc 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: (((("nang du doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("nang du doc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang du doc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang du doc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.