Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"hao van doc snippets" » "hao van code snippets", "dao van doc snippets", "ho van doc snippets", "cao van doc snippets", "hao van duoc snippets", "hao van hoc snippets", "hao van loc 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 doc 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 doc snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( hao van doc snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("hao van doc snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.