Perhaps you should try some spelling variations:
trinh luan » trinh luat, trinh quan, trinh toan
cang thang » cong thanh, dang thanh
trinh han » trinh quan
bang cong » dang cong, bang song, hang cong
cong cang » cong cong, cong lang, cong vang
chi xanh » chi anh, chi danh, chi hanh
thang va » hang va, trang va, thong va
doi chi » doi khi

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chi xanh - canh ((trinh luan) or (trinh han)) bang cong cang thang va~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi xanh - canh ((trinh luan) OR (trinh han)) bang cong cang thang va*.