Perhaps you should try some spelling variations:
tranh chua » tranh cua, trinh chuan, tranh chap
chua hang » cua hang, chua nang, chua xang
hang cong » dang cong, hang nong, bang cong
chi xanh » chi anh, chi hanh, chieu xanh
chi danh » chi dan, chi anh, chi dinh
van than » van thanh, van thang, van tuan
van chat » cao chat

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) or (chi danh)) - canh tranh chua hang cong ((van than) or (van chat)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chi xanh) OR (chi danh)) - canh tranh chua hang cong ((van than) OR (van chat)) cao.
• Adding a wildcard symbol may retrieve word variants: doi ((chi xanh) or (chi danh)) - canh tranh chua hang cong ((van than) or (van chat)) cao*.