Perhaps you should try some spelling variations:
thien chanh » thien thanh, thien chinh, hien hanh
thanh trung » thanh tung
trung cua » truong cua, trung tuan, trung cap
cua nhung » va nhung
tien anh » tieng anh, tien manh, dien anh
cong van » cong vang, song van, cong tan
cong san » cong tac
tuan ban » tuan bang, toan ban, luan 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 ((tien anh) or (thien chanh)) - thanh trung cua nhung ((cong van) OR (cong san)) tuan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((tien anh) OR (thien chanh)) - thanh trung cua nhung ((cong van) OR (cong san)) tuan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((tien anh) or (thien chanh)) - thanh trung cua nhung ((cong van) OR (cong san)) tuan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((tien anh) or (thien chanh)) - thanh trung cua nhung ((cong van) OR (cong san)) tuan ban*.