Perhaps you should try some spelling variations:
thanh tung » thanh cong
thong cong » trong cong, tong cong, thong thong
cua thong » cua thuong, cua khong, cua tong
doc hieu » toc thieu, hoc thieu, hoc hien
theo chu » theo chieu, cho chu, chao chu
tung cua » trung cua, tuong cua, dung cua
cong ban » cong bang, cong san, cong tan
ban khan » ban than, ban nhan, ban chan
khan ap » khan cap, han ap, khan dam

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) or (((theo tieu) or (theo chu)))) xanh - thanh tung cua thong cong ban khan ap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((doc hieu) OR (((theo tieu) OR (theo chu)))) xanh - thanh tung cua thong cong ban khan ap.
• Adding a wildcard symbol may retrieve word variants: ((doc hieu) or (((theo tieu) or (theo chu)))) xanh - thanh tung cua thong cong ban khan ap*.