Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"phu dan cac snippets" » "phu san cac snippets", "phu da cac snippets", "phu can cac snippets", "phu dan cach snippets", "phu dang cac snippets", "phu dan ca 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: (((("phu dan cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("phu dan cac snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( phu dan cac snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phu dan cac snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.