Perhaps you should try some spelling variations:
dung cong » dung trong
chi xanh » chi anh, chi danh, chi hanh
cong suc » cong thuc, cong suat, cong chuc
suc dung » su dung, duc dung, tuc dung
cong tan » cong tac, cong san, cong thanh
doi chi » doi khi
tan van » tran van, tang van, luan van

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - thanh cong suc dung cong tan van ban~.
• Adding a wildcard symbol may retrieve word variants: doi chi xanh - thanh cong suc dung cong tan van ban*.