Perhaps you should try some spelling variations:
hanh trung » thanh trung, hanh trang, manh trung
cong thanh » dong thanh, cong trinh, cong tan
hoc thieu » hoc hien
trung tac » trung tam, trong tac, trung tai
dung cong » dung trong
thanh hoa » thanh pho
tac dung » sach dung, xay dung, tin dung

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((hoc thieu) or (toc thieu)) tinh - hanh trung tac dung cong thanh hoa dan~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((hoc thieu) OR (toc thieu)) tinh - hanh trung tac dung cong thanh hoa dan*.