Perhaps you should try some spelling variations:
tranh trong » tran trong, trinh trong, anh trong
trong thuat » trong hoat, trong thu, trong phat
chieu xanh » chieu sach, chieu tinh, hieu manh
chieu sang » chieu sach, hieu lang, nhieu tang
thuat xung » thuat dung, thuat hung, thuat ung
xung cong » xuong cong, dung cong, luong cong
cong manh » cong danh, duong manh, cong thanh
toan cao » toan tap
toan ban » van ban

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

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