Perhaps you should try some spelling variations:
thanh tung » thanh cong
hieu sang » chieu sang, hieu lang, hieu quang
dung cong » dung trong
cong manh » cong danh, duong manh, cong thanh
doc hieu » toc thieu, hoc thieu, hoc hien
tung dap » tung dan, trung dai, tuong dan
dap dung » ap dung, dan dung, dap ung
toan cau » toan cao, toan tap, toan tai
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: doc hieu sang - thanh tung dap dung cong manh ((toan cau) or (toan ban))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: doc hieu sang - thanh tung dap dung cong manh ((toan cau) OR (toan ban)).
• Adding a wildcard symbol may retrieve word variants: doc hieu sang - thanh tung dap dung cong manh ((toan cau) or (toan ban))*.