Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
thanh toan » thanh hoa, thanh san, tinh toan
hieu manh » hieu nganh, dieu hanh, hien hanh
hang hang » nang hang, cang thang, hung thang
lang cong » dang cong, hang cong, lang dong
bang cong » dang cong, bang song, hang cong
hang tai » hang va, dung tai
toan ban » van ban

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((chieu xanh) or (hieu manh)) - hang hang tai ((lang cong) OR (bang cong)) thanh toan ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((chieu xanh) OR (hieu manh)) - hang hang tai ((lang cong) OR (bang cong)) thanh toan ban.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((chieu xanh) or (hieu manh)) - hang hang tai ((lang cong) OR (bang cong)) thanh toan ban".
• Adding a wildcard symbol may retrieve word variants: hoc ((chieu xanh) or (hieu manh)) - hang hang tai ((lang cong) OR (bang cong)) thanh toan ban*.