Perhaps you should try some spelling variations:
tranh quan » tranh quang, trinh quan, tranh luan
chua xang » chua nang, chuc nang, chu bang
quan hang » quan hoang, quan lang, quan hanh
hang cong » dang cong, hang nong, bang cong
chu xanh » chu manh, chieu xanh, chuc danh
tac tuan » ta tuan, tai tuan, tac tuyen

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

• If you are trying to use Boolean operators, they must be ALL CAPS: theo ((chu xanh) OR (chua xang)) - canh tranh quan hang cong ((tac tuan) OR (tac quan)) cau~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "theo ((chu xanh) or (chua xang)) - canh tranh quan hang cong ((tac tuan) OR (tac quan)) cau~".
• Adding a wildcard symbol may retrieve word variants: theo ((chu xanh) or (chua xang)) - canh tranh quan hang cong ((tac tuan) OR (tac quan)) cau*.