Perhaps you should try some spelling variations:
ngang thanh » nang thanh, nganh thanh, ngan thanh
theo chieu » theo tieu, ho chieu, theo chu
chieu xanh » chieu sach, chieu sang, chieu tinh
cong ngang » cong nhan, cong quang, cong lang
tran hung » tran quang, tran hoang, tran huu
tran hong » tran hoang, tran trong, tranh hang
thanh ban » thanh san, thanh van, thanh bac

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

• Performing a fuzzy search may retrieve terms with similar spellings: theo chieu xanh - thanh cong ((tran hung) or (tran hong)) cong ngang thanh ban~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo chieu xanh - thanh cong ((tran hung) OR (tran hong)) cong ngang thanh ban*.