Perhaps you should try some spelling variations:
chieu xanh » chieu sang, chieu tinh, hieu manh
chieu sach » chinh sach, chiet tach, chieu sang
tran trong » gian trong, quan trong, tran hong
trong thu » trong nha
dung cong » dung trong
thu dung » thuy dung, thuc dung, thu dang
tap toan » tap quan, bai toan
tap doan » tap quan

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) or (chieu sach)) - tran trong thu dung cong ((tap toan) OR (tap doan)) tap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doi ((chieu xanh) OR (chieu sach)) - tran trong thu dung cong ((tap toan) OR (tap doan)) tap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "doi ((chieu xanh) or (chieu sach)) - tran trong thu dung cong ((tap toan) OR (tap doan)) tap".
• Adding a wildcard symbol may retrieve word variants: doi ((chieu xanh) or (chieu sach)) - tran trong thu dung cong ((tap toan) OR (tap doan)) tap*.