Perhaps you should try some spelling variations:
thang cong » thang long, thong cong, hang cong
dai thang » danh thang, tai thanh, dai han
ho chiet » ho chieu, hoc thiet, hoa thiet
ho thiet » hoc thiet, hoa thiet, so thiet
cong dan » cong san, cong tan, huong dan
dan than » dan chan, ban than, van than
than cap » khan cap, thanh lap, thanh cac

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

• Performing a fuzzy search may retrieve terms with similar spellings: ((ho chiet) or (ho thiet)) tach - ((thanh tung) OR (thanh cong)) dai thang cong dan than cap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho thiet)) tach - ((thanh tung) OR (thanh cong)) dai thang cong dan than cap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) or (ho thiet)) tach - ((thanh tung) OR (thanh cong)) dai thang cong dan than cap".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) or (ho thiet)) tach - ((thanh tung) OR (thanh cong)) dai thang cong dan than cap*.