Perhaps you should try some spelling variations:
"locating bug core snippets" » "locating bug code snippets"
"phan doan o2 snippets" » "phan doan code snippets", "chan doan o2 snippets", "phan hoan o2 snippets", "chuan doan o2 snippets", "phan doan o snippets"
"python using java snippets" » "python using data snippets"

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (((("phan doan o2 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((((\"phan doan o2 snippets\") OR (\"python using java snippets\"))) OR (\"locating bug core snippets\"))".
• Removing quotes may allow a broader search: (((( phan doan o2 snippets ) OR ( python using java snippets ))) OR ( locating bug core snippets )).
• Adding a wildcard symbol may retrieve word variants: (((("phan doan o2 snippets") OR ("python using java snippets"))) OR ("locating bug core snippets"))*.