Perhaps you should try some spelling variations:
thanh truong » thanh thuong, thanh tung, thanh huong
thanh trung » thanh tung
toan thang » toan thong, thanh thang, tran thanh
hoc thieu » toc thieu, hoc hien
dang cong » dung cong
cong toan » cong tan, cong hoan, cong tuan
thang lap » thanh lap, thang lao, thong lap
ho chieu » theo chieu, mot chieu, doi chieu
van dang » van dong, van dung, van nang

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chieu) or (hoc thieu)) tinh - ((thanh truong) OR (thanh trung)) van dang cong toan thang lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) tinh - ((thanh truong) OR (thanh trung)) van dang cong toan thang lap*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) or (hoc thieu)) tinh - ((thanh truong) OR (thanh trung)) van dang cong toan thang lap*".