Perhaps you should try some spelling variations:
thanh thuong » thanh huong, thanh chuong, thanh phuong
thiet tach » chiet tach, thien hach, thuat tach
hoc thiet » hoc thieu, hoc thuyet, hoc hien
thuong va » truong va, thong va, thuong mai
dung cong » dung trong
khoan cam » khoa cam, khoan va, phan cam
cong san » cong tac
than cua » nhan cua, thai cua, ban cua
khan cap » khan ap, than cap, phan cac
va dung » van dung, va duong, vat 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 thiet tach - thanh thuong va dung cong san ((than cua) or (((khan cap) OR (khoan cam))))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc thiet tach - thanh thuong va dung cong san ((than cua) OR (((khan cap) OR (khoan cam)))).
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc thiet tach - thanh thuong va dung cong san ((than cua) or (((khan cap) OR (khoan cam))))".
• Adding a wildcard symbol may retrieve word variants: hoc thiet tach - thanh thuong va dung cong san ((than cua) or (((khan cap) OR (khoan cam))))*.