Perhaps you should try some spelling variations:
thanh trung » thanh tung
trung dang » truong dang, trung dung, trong dang
dang quang » dung quang, nang quan, dang hung
quang cong » quang cuong, quang dong, quang hoang
ho thiet » hoc thiet, hoa thiet, so thiet
ho chieu » theo chieu, hoc thieu, doi chieu
cong dan » cong san, cong tan, huong dan
khoan va » doan va, khoa ma, toan va
nhan va » nhan tai, nhan dan, nhan tao

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho thiet) or (ho chieu)) tach - thanh trung dang quang cong dan ((khoan va) OR (nhan va))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho thiet) OR (ho chieu)) tach - thanh trung dang quang cong dan ((khoan va) OR (nhan va))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) or (ho chieu)) tach - thanh trung dang quang cong dan ((khoan va) OR (nhan va))*".