Perhaps you should try some spelling variations:
thieu xanh » chieu xanh, hieu manh, thien anh
tran thanh » ban thanh, quan thanh
thong cong » trong cong, tong cong, thong thong
hoc thieu » toc thieu, hoc hien
van thanh » ban thanh, van tuan
cong dan » cong san, cong tan, huong dan
than cau » toan cau, phan cau, than cap
khan ap » khan cap, han ap, khan dam

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

• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thieu xanh - thanh ((tran thanh) OR (van thanh)) thong cong dan ((than cau) OR (khan ap))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thieu xanh - thanh ((tran thanh) OR (van thanh)) thong cong dan ((than cau) or (khan ap))~".
• Adding a wildcard symbol may retrieve word variants: hoc thieu xanh - thanh ((tran thanh) OR (van thanh)) thong cong dan ((than cau) or (khan ap))*.