Perhaps you should try some spelling variations:
nhung cong » dung cong, thong cong, hang cong
thanh toan » thanh hoa, thanh san, tinh toan
hieu xanh » chieu xanh, hieu manh, hieu nganh
doc hieu » toc thieu, hoc thieu, hoc hien
trang va » tran van, hang va
dan toan » van toan, dan than, manh toan
tang va » tang van, thang va, tang vat

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

• Performing a fuzzy search may retrieve terms with similar spellings: doc hieu xanh - hanh ((tang va) OR (trang va)) nhung cong ((dan toan) OR (thanh toan)) ban~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doc hieu xanh - hanh ((tang va) OR (trang va)) nhung cong ((dan toan) OR (thanh toan)) ban".
• Adding a wildcard symbol may retrieve word variants: doc hieu xanh - hanh ((tang va) OR (trang va)) nhung cong ((dan toan) OR (thanh toan)) ban*.