Perhaps you should try some spelling variations:
cong quang » luong quang, thong quang, duong quang
hoc thieu » toc thieu, hoc hien
manh tung » manh hung, thanh tung
dung cong » dung trong
ho chieu » theo chieu, doi chieu, mot chieu
tung cua » trung cua, tuong cua, dung cua
cua dung » cua dang, cua dong, qua dung
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: ((ho chieu) OR (hoc thieu)) tinh - manh tung cua dung cong quang ((toan tap) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: ((ho chieu) OR (hoc thieu)) tinh - manh tung cua dung cong quang ((toan tap) OR (toan ban))*.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((ho chieu) OR (hoc thieu)) tinh - manh tung cua dung cong quang ((toan tap) or (toan ban))*".