Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
doi chieu » doc hieu, doi chi, ho chieu
dung cong » dung trong
tranh va » tranh van, trang va, trinh va
tan toan » tan tran, van toan, dan toan
tap toan » tap doan, tap quan, bai toan
luan » quan, lan

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

• Performing a fuzzy search may retrieve terms with similar spellings: doi chieu xanh - canh ((tranh va) or (luan van)) dung cong ((tan toan) OR (tap toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi chieu xanh - canh ((tranh va) OR (luan van)) dung cong ((tan toan) OR (tap toan)) cao*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi chieu xanh - canh ((tranh va) or (luan van)) dung cong ((tan toan) OR (tap toan)) cao*".