Perhaps you should try some spelling variations:
thanh tran » thanh trang, thanh toan, thanh tra
nhung cong » dung cong, thong cong, nhung don
tran tuan » tran xuan, tran quang, tran thanh
hang cong » dang cong, hang nong, bang cong
dien anh » tieng anh, dien dan
bai toan » bai tap
toan tap » toan 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 ((dien sach) or (dien anh)) - thanh tran tuan ((nhung cong) or (hang cong)) bai toan tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((dien sach) OR (dien anh)) - thanh tran tuan ((nhung cong) OR (hang cong)) bai toan tap.
• Adding a wildcard symbol may retrieve word variants: hoc ((dien sach) or (dien anh)) - thanh tran tuan ((nhung cong) or (hang cong)) bai toan tap*.