Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
nhung cong » dung cong, thong cong, nhung don
toan tuan » tran tuan, toan quan, doan tuan
hang cong » dang cong, hang nong, bang cong
chao chu » cho chu, cua chu, cao cho
chu xanh » chu manh, chieu xanh, chua xang
tap toan » tap doan, tap quan, bai toan

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

• Performing a fuzzy search may retrieve terms with similar spellings: chao chu xanh - thanh toan tuan ((nhung cong) OR (hang cong)) ((tap toan) or (tan tran)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: chao chu xanh - thanh toan tuan ((nhung cong) OR (hang cong)) ((tap toan) OR (tan tran)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "chao chu xanh - thanh toan tuan ((nhung cong) OR (hang cong)) ((tap toan) or (tan tran)) tap".
• Adding a wildcard symbol may retrieve word variants: chao chu xanh - thanh toan tuan ((nhung cong) OR (hang cong)) ((tap toan) or (tan tran)) tap*.