Perhaps you should try some spelling variations:
thiet tach » chiet tach, thien hach, thuat tach
nang hang » nang sang, hang hang, cang thang
hang cong » dang cong, hang nong, bang cong
ho thiet » hoc thiet, hoa thiet, so thiet
tang van » dang van, hoang van, trong van
va hang » van hang, va nang, va lang
tan ran » tan tran, tan van, tan san

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 - nang hang va hang cong ((tan ran) or (tang van)) cau~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ho thiet tach - nang hang va hang cong ((tan ran) OR (tang van)) cau*.