Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hao van hoe snippets" » "hao van code snippets", "dao van hoe snippets", "ho van hoe snippets", "cao van hoe snippets", "hao van hoa snippets", "hao van hoc snippets", "hao van hieu snippets"
"python using java snippets" » "python using data 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: (((("hao van hoe snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("hao van hoe snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hao van hoe snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hao van hoe snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.