Perhaps you should try some spelling variations:
canh trinh » canh tranh, hanh trinh, canh tinh
chuan xang » chua xang, chuan trang, chuan san
chua nang » chuc nang, chua xang, kha nang
cong lang » cong vang, cong luong, cong quang
lang tran » dang tran, lang tren, quang tran
chi hanh » chi nhanh, chi thanh, thi hanh
tran van » luan van
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 hanh - canh trinh ((chuan xang) or (chua nang)) cong lang tran van~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chi hanh - canh trinh ((chuan xang) OR (chua nang)) cong lang tran van*.