Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
hieu xanh » chieu xanh, hieu manh, hieu nganh
nhan cach » phan cac
doc hieu » toc thieu, hoc thieu, hoc hien
trinh va » trinh van, trinh vat, trinh ve
trang va » tran van, hang va
cong dan » cong san, cong tan, huong dan
hang dau » hang va, hang tai

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 - canh ((trinh va) or (trang va)) nhung cong dan ((hang dau) or (nhan cach))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu xanh - canh ((trinh va) OR (trang va)) nhung cong dan ((hang dau) OR (nhan cach)).
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - canh ((trinh va) or (trang va)) nhung cong dan ((hang dau) or (nhan cach))*.