Perhaps you should try some spelling variations:
trung tuan » trung thanh, trung tam, truong thanh
nhung cong » dung cong, thong cong, hang cong
tran tuan » tran xuan, tran quang, tran thanh
khi xanh » khia canh, thi hanh, thi anh
cong tap » cuong tap, cong tac, cong tan
tap toan » tap doan, tap quan, bai toan
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: doi khi xanh - thanh ((trung tuan) OR (tran tuan)) nhung cong tap toan tap~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi khi xanh - thanh ((trung tuan) OR (tran tuan)) nhung cong tap toan tap".
• Adding a wildcard symbol may retrieve word variants: doi khi xanh - thanh ((trung tuan) OR (tran tuan)) nhung cong tap toan tap*.