Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"cong van he snippets" » "cong van code snippets", "cong vang he snippets", "cong san he snippets", "song van he snippets", "cong van hoe snippets", "cong van hue snippets", "cong van de 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: (((("cong van he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (((("cong van he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( cong van he snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("cong van he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.