Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, tran tuan
nhung cong » dung cong, thong cong, hang cong
trung cua » truong cua, trung cap, dung cua
dien anh » tieng anh, dien dan
cong tan » cong tac, cong san, cong thanh
tan than » tan thanh, tan tran, ban than
than cao » toan cao, thai cao, than cap

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc ((dien sach) or (dien anh)) - manh ((trung cua) or (trung tuan)) nhung cong tan than cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc ((dien sach) OR (dien anh)) - manh ((trung cua) OR (trung tuan)) nhung cong tan than cao.
• Adding a wildcard symbol may retrieve word variants: doc ((dien sach) or (dien anh)) - manh ((trung cua) or (trung tuan)) nhung cong tan than cao*.