Perhaps you should try some spelling variations:
chieu xanh » chieu sach, chieu sang, chieu tinh
dong trong » duong trong, dung trong, cong trong
trinh toan » tinh toan, thanh toan, trinh han
thieu anh » thien anh, thien danh, thieu nhi
anh quang » anh xquang, anh quan, nhanh quang
quang cua » quan cua, quang tuan, quang huy
trinh san » trinh han, trinh quan, trinh luan
cua dong » chua dong, cua cong, cua dang

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

• Performing a fuzzy search may retrieve terms with similar spellings: hoc ((thieu anh) or (chieu xanh)) - anh quang cua dong trong ((trinh san) OR (trinh toan)) cao~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc ((thieu anh) OR (chieu xanh)) - anh quang cua dong trong ((trinh san) OR (trinh toan)) cao.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc ((thieu anh) or (chieu xanh)) - anh quang cua dong trong ((trinh san) OR (trinh toan)) cao".
• Adding a wildcard symbol may retrieve word variants: hoc ((thieu anh) or (chieu xanh)) - anh quang cua dong trong ((trinh san) OR (trinh toan)) cao*.