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