Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
cong thanh » dong thanh, cong trinh, cong tan
hieu xanh » chieu xanh, hieu manh, hieu nganh
trung cua » truong cua, trung tuan, trung cap
doc hieu » toc thieu, hoc thieu, hoc hien
dung cua » dung luan, dung cho
phan van » pham van, thanh 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: doc hieu xanh - thanh ((trung cua) or (dung cua)) nhung cong thanh ((hang va) or (phan van))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - thanh ((trung cua) OR (dung cua)) nhung cong thanh ((hang va) OR (phan van)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - thanh ((trung cua) or (dung cua)) nhung cong thanh ((hang va) or (phan van))*.