Perhaps you should try some spelling variations:
dang thanh » dong thanh, dang hanh, hoang thanh
hieu xanh » chieu xanh, hieu nganh, dieu hanh
hieu manh » chieu xanh, hieu nganh, dieu hanh
tang chua » tang cua, tranh chua, tang khu
dong cong » duong cong, dung cong, dang cong
cong dang » cong dong, cong dan, cong dung
thanh ca » thanh cha, thanh cac, thanh ha
tang ha » lang ha, tang ma, trung ha

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) or (hieu manh)) - hanh ((tang chua) OR (tang ha)) dong cong dang thanh ca~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((hieu xanh) OR (hieu manh)) - hanh ((tang chua) OR (tang ha)) dong cong dang thanh ca*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc ((hieu xanh) or (hieu manh)) - hanh ((tang chua) OR (tang ha)) dong cong dang thanh ca*".