Denshi Jisho — Online Japanese dictionary

悪戦苦闘 あくせんくとう hard fighting; hard struggle; fighting against heavy odds
Noun, Suru verb 

You can also

Look up kanji details for 悪戦苦闘.

Try a Yahoo Jisho search for 悪戦苦闘 .
Try a Goo Jisho search for 悪戦苦闘 .
Try a Google search for 悪戦苦闘 .