Perhaps you should try some spelling variations:
"python using java snippets" » "python using data snippets"
"manh van loc snippets" » "anh van loc snippets", "menh van loc snippets", "canh van loc snippets", "manh van hoc snippets", "manh van loi snippets", "manh van ngoc 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: (((("manh van loc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("manh van loc snippets") OR ("python using java snippets"))) OR ("locating bug code snippets")).
• Removing quotes may allow a broader search: (((( manh van loc snippets ) or ( python using java snippets ))) or ( locating bug code snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("manh van loc snippets") or ("python using java snippets"))) or ("locating bug code snippets"))*.