Perhaps you should try some spelling variations:
trung thanh » truong thanh
thieu xanh » chieu xanh, hieu manh, thien anh
trung hanh » trung khanh, trung anh, trong hanh
nhung cong » dung cong, thong cong, hang cong
hoc thieu » toc thieu, hoc hien
cong tan » cong tac, cong san, cong thanh
tran van » luan van

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

• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((trung hanh) OR (trung thanh)) nhung cong tan tran van~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((trung hanh) OR (trung thanh)) nhung cong tan tran van*.