Perhaps you should try some spelling variations:
thanh thang » thanh thanh, thanh hang, thanh toan
nhanh thang » nhanh thanh, nhanh quang, hanh trang
hoa thiet » hoc thiet, toan thiet, hoa viet
nang cong » nang song, dang cong, bang cong
ho thiet » hoc thiet, so thiet, hoc thieu
van nang » van quang, van ban, van dong
cong san » cong tac
san toan » van toan, dan toan, manh toan
toan cao » toan ban, toan tap

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 (hoa thiet)) tach - ((thanh thang) or (nhanh thang)) van nang cong san toan cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho thiet) OR (hoa thiet)) tach - ((thanh thang) OR (nhanh thang)) van nang cong san toan cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho thiet) OR (hoa thiet)) tach - ((thanh thang) or (nhanh thang)) van nang cong san toan cao".
• Adding a wildcard symbol may retrieve word variants: ((ho thiet) OR (hoa thiet)) tach - ((thanh thang) or (nhanh thang)) van nang cong san toan cao*.