Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
luan nhung » luan chung, luan hung, luan phuong
quan nhung » qua nhung, cua nhung, luan chung
tieu xanh » tieu danh, chieu xanh, dieu hanh
cong van » cong vang, cong san, song van
ban can » ban dan, ban hang, ban hanh

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu xanh - thanh toan ((luan nhung) or (quan nhung)) cong van ban can~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu xanh - thanh toan ((luan nhung) OR (quan nhung)) cong van ban can*.