Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"phan thi he snippets" » "phan thi code snippets", "pham thi he snippets", "tran thi he snippets", "phan tu he snippets", "phan thi hue snippets", "phan thi hoe snippets", "phan thi ha 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: (((("phan thi 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: (((("phan thi he snippets") OR ("python using java snippets"))) OR ("locating bug core snippets")).
• Removing quotes may allow a broader search: (((( phan thi he snippets ) or ( python using java snippets ))) or ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan thi he snippets") or ("python using java snippets"))) or ("locating bug core snippets"))*.