Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
hang hang » nang hang, cang thang, hung thang
ho thiet » hoc thiet, hoa thiet, so thiet
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan tai » toan tap, doanh tai, toan ban
toan cao » toan ban, toan tap
va nang » van nang, da nang, cam 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 thiet tach - hang hang va nang ((cong dan) OR (cong san)) ((toan tai) or (toan cao))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - hang hang va nang ((cong dan) OR (cong san)) ((toan tai) OR (toan cao)).
• The words AND, OR and NOT may confuse the search; try adding quotes: "ho thiet tach - hang hang va nang ((cong dan) OR (cong san)) ((toan tai) or (toan cao))".
• Adding a wildcard symbol may retrieve word variants: ho thiet tach - hang hang va nang ((cong dan) OR (cong san)) ((toan tai) or (toan cao))*.