Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"nang do voi snippets" » "nang doc voi snippets", "nang dao voi snippets", "nang du voi snippets", "nang doi voi snippets", "nang do moi 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 do voi 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 do voi snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( nang do voi snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("nang do voi snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.