Perhaps you should try some spelling variations:
thanh tung » thanh cong
dap nhung » vap nhung, va nhung, dap ung
thanh lap » thanh san, phan lap, thanh hai
ho chiet » ho chieu, hoc thiet, hoa thiet
ho thiet » hoc thiet, hoa thiet, so thiet
tung dap » tung dan, trung dai, tuong dan
cong dan » cong san, huong dan, cong dong
cong tan » cong tac, cong san, cong thanh

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 dap nhung ((cong dan) OR (cong tan)) thanh lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chiet) OR (ho thiet)) tach - thanh tung dap nhung ((cong dan) OR (cong tan)) thanh lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chiet) or (ho thiet)) tach - thanh tung dap nhung ((cong dan) OR (cong tan)) thanh lap".
• Adding a wildcard symbol may retrieve word variants: ((ho chiet) or (ho thiet)) tach - thanh tung dap nhung ((cong dan) OR (cong tan)) thanh lap*.