Perhaps you should try some spelling variations:
thanh trung » thanh tung
thiet danh » thien danh, thien anh, tiep danh
thien dang » thien bang, thien danh, thien nang
trung luan » truong luan, trung tuan, trung quan
luan nhung » luan chung, luan hung, quan nhung
cong dan » cong tan, huong dan, cong dong
cong san » cong tac
toan ban » van ban

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 danh) OR (thien dang)) - thanh trung luan nhung ((cong dan) or (cong san)) toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thiet danh) OR (thien dang)) - thanh trung luan nhung ((cong dan) OR (cong san)) toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thiet danh) OR (thien dang)) - thanh trung luan nhung ((cong dan) or (cong san)) toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((thiet danh) OR (thien dang)) - thanh trung luan nhung ((cong dan) or (cong san)) toan ban*.