Perhaps you should try some spelling variations:
thanh toan » thanh hoa, thanh san, tinh toan
hang hang » cang thang, hung thang, lang thang
nang hang » nang sang, cang thang, lang thang
nang cong » nang song, dang cong, bang cong
khi xanh » khia canh, thi hanh, thi anh
dan toan » van toan, dan than, manh toan
da nang » cam nang, kha nang, cao nang

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

• If you are trying to use Boolean operators, they must be ALL CAPS: doi khi xanh - ((hang hang) OR (nang hang)) da nang cong ((dan toan) OR (thanh toan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi khi xanh - ((hang hang) OR (nang hang)) da nang cong ((dan toan) or (thanh toan)) cau~".
• Adding a wildcard symbol may retrieve word variants: doi khi xanh - ((hang hang) OR (nang hang)) da nang cong ((dan toan) or (thanh toan)) cau*.