Perhaps you should try some spelling variations:
thiet hach » thien hach, thuyet hach, chiet tach
trung tuan » trung thanh, trung tam, truong thanh
thiet hai » thiet bi, thi hai, thien tai
tran tuan » tran xuan, tran quang, tran thanh
dung cong » dung trong
ban thanh » ban hanh, ban hang
thanh lap » thanh san, phan lap, thanh hai
cong ban » cong bang, cong san, cong tan

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

• Performing a fuzzy search may retrieve terms with similar spellings: soc ((thiet hach) OR (thiet hai)) - thanh ((trung tuan) or (tran tuan)) dung cong ban thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: soc ((thiet hach) OR (thiet hai)) - thanh ((trung tuan) OR (tran tuan)) dung cong ban thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "soc ((thiet hach) OR (thiet hai)) - thanh ((trung tuan) or (tran tuan)) dung cong ban thanh lap".
• Adding a wildcard symbol may retrieve word variants: soc ((thiet hach) OR (thiet hai)) - thanh ((trung tuan) or (tran tuan)) dung cong ban thanh lap*.